• Southwest Airlines Flight 1380 made an emergency landing at Philadelphia International Airport on Tuesday after suffering a major engine failure.
• One passenger, Jennifer Riordan, died, and seven others were treated for their injuries.
• Investigators believe the engine failed when one of its fan blades snapped off midflight.

Southwest Airlines Flight 1380 made an emergency landing at Philadelphia International Airport on Tuesday after suffering a catastrophic engine failure and cabin decompression.

One passenger, Jennifer Riordan, died as a result of the incident. Her death was the first in an accident aboard a US commercial airliner since 2009.

The aircraft was a nearly 18-year-old Boeing 737-7H4 with the tail number N772SW. It was delivered to Southwest in July 2000.

National Transportation Safety Board investigators believe the left engine failed when one of its 24 titanium alloy fan blades snapped off midflight, causing the front cowling of the engine to disintegrate and firing shrapnel into the cabin of the aircraft.

The engine in question is a CFM56-7B turbofan, the product of a 40-year-old joint venture between GE Aviation and France's Safran Aircraft Engines called CFM International.

The CFM56 is arguably one of the safest and most popular jet engines in the world, with more than 30,000 units produced since 1980, and it's used on both civilian and military aircraft. The CFM56-7B, which debuted in 1997, powers more than 6,700 planes worldwide.

In August 2016, Southwest Flight 3472, another Boeing 737 powered by a CFM56 engine, suffered an eerily similar failure, though no one was injured.

Southwest Airlines CEO Gary Kelly told the NTSB on Tuesday that the airline would inspect its entire fleet of more than 710 CFM56-powered Boeing 737s using ultrasonic technology, which scans the engine's fan blades for microscopic cracks that can be caused by metal fatigue.

Here's how Flight 1380 unfolded.

SEE ALSO: One person is dead after a major engine failure led a Southwest plane to make a terrifying emergency landing in Philadelphia

At 10:43 a.m. on Tuesday, Southwest Airlines Flight 1380 takes off from LaGuardia Airport in New York, headed for Love Field in Dallas before continuing onto New Orleans.

At 11:03 a.m., while flying at 32,500 feet and traveling at 496 mph over eastern Pennsylvania, the left engine of the 737 fails.

The violent event causes the front cowling of the engine to disintegrate, firing shrapnel into the fuselage of the aircraft.

• "Rich" is defined by some Americans as having an average of $2.4 million, according to a Charles Schwab survey.
• But how much money you need to earn to be considered "rich" by the government's standards depends on the city you live in.
• What's considered rich in Seattle is nearly $100,000 more than what's considered rich in Detroit.

Just how much money do you need to earn to be considered "rich"?

For some Americans, the answer is having an average of $2.4 million to your name — that's almost 30 times the actual median net worth of US households, according to the U.S. Census Bureau. 

Ask the government, and they'll define wealthy as individuals earning at least $500,001 and couples earning at least $600,000 — the new income thresholds that now pay the top federal marginal income tax rate of 37% in accordance with President Donald Trump's new tax plan.

But in reality, the answer varies depending on the city you live in. What's considered rich in Detroit is almost $100,000 less than what's considered rich in Seattle.

Not sure if you fall into the upper class?

We pooled 5-year estimate data from the U.S. Census Bureau's American Community survey, combining results on median household income from 2012-2016 to determine just how much you need to earn in the most populated city in every state, including Washington DC, to be considered rich (hint: it's at least twice the median household income).

Below, check out the income needed to be considered rich in some of America's biggest cities, ranked from lowest to highest.

SEE ALSO: How much money you have to earn to be considered rich in 42 major US cities

DON'T MISS: Here's the salary you need to be in the top 50% of earners in 50 major US cities

51. Detroit, Michigan: at least $52,498

Median household income: $26,249

Population: 683,443

50. Birmingham, Alabama: at least $64,808

Median household income: $32,404

Population: 212,424

49. Jackson, Mississippi: at least $65,732

Median household income: $32,866

Population: 172,039

The Insider Picks team writes about stuff we think you'll like. Business Insider has affiliate partnerships, so we get a share of the revenue from your purchase.

You may not think about it, but you probably spend more time with your coworkers than your family and friends. That means they're in the unique position of knowing a lot about your day-to-day problems and can offer solutions you take seriously. 

We asked the Business Insider staff to tell us which gadget recommendations they got from coworkers, and you'll find their picks below. They're all fixes to the issues many of us deal with every day, like wanting a way to enjoy music while working, trying to avoid doing chores after a day at the office, or reading more. 

Coworkers may not be the first people you turn to for recommendations or advice, but as the people on this list can attest to, they may be among the most qualified. 

SEE ALSO: 26 things under $20 we use every day

SEE ALSO: 22 awesome and weird things we bought using Amazon Prime

On-ear bluetooth headphones

Sony MDRXB650BT Extra Bass Bluetooth Headphones, $82.65, available at Amazon

These headphones are an excellent value for somebody who isn't looking for an audiophile-grade pair and just wants something that connects easily and get the job done. — Matthew DeBord

A robot vacuum

ECOVACS Robotic Vacuum Cleaner, $224.58, available at Amazon

I got a robotic vacuum cleaner after my editor said it was a game changer for his apartment. He'd recommended a Roomba but I got the cheaper 'Amazon's choice' after reading some reviews that said it was just as good. And it is! Vacuuming isn't the hardest chore but it's always a nice feeling to come home to impeccable floors with zero effort. — Akin Oyedele

A surge protector

Belkin 12-Outlet Power Strip Surge Protector, $18.99, available at Amazon

After explaining that the Dyson heater I bought to thaw my apartment this winter kept shorting out my electricity, a colleague recommended that I spend $20 on the Belkin surge protector. Now I can enjoy heat and all my living room gadgets without wincing every time I turn on a switch. Best $20 I’ve spent in awhile. — Mara Leighton

• Ford is basically printing money with the redesigned F-Series.
• The carmaker sold nearly 900,000 of these vehicles in 2017.
• The F-Series has been the bestselling lineup of vehicles in the US for decades.

There's no shortage of pickup-truck choices in the US, but when most people think "pickup," one vehicle comes to mind: the Ford F-150.

The F-150 is part of Ford's F-Series, consisting also of the F-250, F-350, and F-450 Super Duty pickups; and there's a high-performance variant of the F-150, the Raptor.

The first F-Series arrived back in 1948 and was basically a work truck. Ever since the early 1980s, the F-150 hasn't just been popular — it's been America's bestselling vehicle every single year.

Now in its 13th generation, the F-Series went through major redesigns in 2015 and 2016. The F-150 went first, getting new, lightweight aluminum construction; the Super Duty followed, it's first major reworking in decades.

At Ford, there is no product that's more central to the business than the F-Series, so the redesign was a major risk. But it has paid off: Ford has an average transaction price of $45,500 on the pickups, an increase of more than $3,000 from last year.

The truck is going to bring a ridiculous amount of cash into Ford's already cash-rich coffers, especially if the US sales boom holds up in 2018

We've reviewed several F-Series trucks over the years, so here's a closer look at the king of pickups.

FOLLOW US: on Facebook for more car and transportation content!

SEE ALSO: Here's how Ford redesigned its Super Duty pickup truck to 'run to failure'

We sampled the new F-150, aluminum edition, back in 2015. You can get the base XL, an old-school work truck, for under $30,000.

Here's the thing about Ford pickups: the profit margins are almost stupid. We're talking over $10,000 on average, and given that many owners choose costly trim levels and option up their trucks, the F-Series functions like a license to print money for Ford. 

Read our review of the F-150.

There was some concern initially that the aluminum construction wouldn't be Ford tough, but truck owners appear to pretty satisfied.

In 2017, Ford even rolled out a "pursuit rated" police version of the F-150.

The new truck can hit 100 mph, with its turbocharged V6 serving up 375 horsepower and 470 lb.-ft. of torque – "more than any other pursuit-rated police vehicle," Ford said in a statement when the vehicle was revealed in 2017.

Check out more about the extreme truck.

An overwhelming majority of the world's population breathes polluted air, according to a new report from State of Global Air. 

Ninety-five percent of the world's population lives in an area where the air quality does not meet the World Health Organization's healthy air guideline, which is PM2.5. 

PM2.5 means particulate matter in the air — caused by motor exhaust or anything combustible — that is less than 2.5 micrometers. 

The State of Global Air report also includes data detailing the number and rate of deaths attributable to air pollution in each country in 2016.

Below are the 13 countries with the highest death rates from air pollution:

SEE ALSO: The 27 countries in the world with the most freedom

13. Cote d'Ivoire

Death rate per 100,000 people: 248

Overall deaths: 23,700

Source: State of Global Air

12. North Korea

Death rate per 100,000 people: 249

Overall deaths: 56,100

Source: State of Global Air

11. Togo

Death rate per 100,000 people: 250

Overall deaths: 6,800

Source: State of Global Air

A Snapchat feature called "do not disturb" lets users silence notifications from specific people or groups without letting them know; it's one of the few well-received features on the Snapchat redesign that's been rolling out these last few months. 

The feature is inspired by those overly communicative friends who make you regret agreeing to push notifications, and is a great alternative to turning notifications off completely when your phone won't stop buzzing.

Snap was a little late to the game, since Facebook Messenger and iMessage already offered similar options — that could even be why it was released with no word from the company when it came out back in January, shared instead by TechCrunch's Josh Constine.

Here's how to use Snapchat's popular Do Not Disturb feature:

SEE ALSO: RED announced its $1,200 smartphone is coming this summer — take a look at all its futuristic technologies

Find the contact you want to mute in your friends list, and hold down the contact's name to get this screen. Then select "Settings."

As part of the redesign, you have to swipe right from your camera to get to your friends list.

Tap "Do Not Disturb" to disable notifications from that contact or group, but note that nothing will happen right away.

If the "Do Not Disturb" option doesn't appear, you might not have the most updated version of the app.

To see if it worked, you have to tap out of the contact's menu completely and then go back to it to see if the "Do Not Disturb" option changed to say "Turn On Notifications"

If it changed, you'll know the deed is done, but the person or persons you silenced will be none the wiser.

Food tastes blander

Leaving the house suddenly feels terrifying

Migraines start appearing like clockwork

• To make life easier for grocery store employees, you should be aware of some of your actions that can be a nuisance.
• Kindness goes a long way, so be sure to thank your cashier at the register when you're paying.
• Don't let your children run amok because they can knock things over and cause spills that are hard to clean up.

If you’ve ever worked behind a cash register, you know how hard it can be. In truth, the customer is not always right, especially at the grocery store. Since most of us have to buy our groceries from somewhere, the least we can do is try not to aggravate the hard-working stock clerks, cashiers, and baggers. Check out (pardon the pun) these folks’ biggest pet peeves … and maybe you’ll think twice the next time you’re strolling the aisles.

“If it doesn’t scan, I get it for free, right?”

This is probably the most overtold joke in the grocery store, eliciting a groan from all but the most patient (or poker-faced) employees. Sadly, regardless of whether or not the scanner registers your item on the first try, you still have to pay for it … so resist the temptation to use this shopworn humor on the cashier.

Pro tip: Most major grocery chains do, however, offer discounts on dented cans, and it’s fine to ask the cashier about this.

Neglecting to say thanks

It’s so easy to practice simple manners, and we promise it makes a world of difference to slow down, look an employee in the eye and thank them for their work. Small kindnesses go a long way toward making a person’s day.

Bringing more than 10 items to the 10-items-or-less lane

Lanes with this requirement were created for efficiency, so people with just a few items can, theoretically, get in and check out fast. Using the fast lane when you have more than 10 items makes the line longer for everyone behind you. Do your fellow shoppers a solid by using the correct lane, even if the wait looks a bit longer.

Cooking and baking have been my life for a long time. I've done both professionally for several years — and the striking differences between home and professional culinary pursuits can be vast.

If there's one thing I've learned, it's that just because you're a professional doesn't mean that you never make mistakes. But the coolest part is that you get to put all your very specific knowledge to use in fixing those mistakes because you have a good idea of what went wrong.

I rounded up all of the most common mistakes that people make when crafting their favorite baked goods.

Confusing baking powder and baking soda

Both baking powder and baking soda are commonly-used raising agents in recipes for cookies, cakes, and quick-breads (or most breads that aren't yeast-raised).

These are also referred to as "chemical leaveners," because that's exactly what they are. If you'll recall from chemistry class, baking soda is a base. It reacts by forming carbon dioxide bubbles when  it comes into contact with acidic ingredients such as buttermilk, yogurt, and vinegar — yes, just like that volcano you made for the third grade science fair.

Baking powder contains baking soda, but it also contains other chemical leaveners that make it double-acting. After the baking soda part reacts with any acids in your recipe, a second chemical leavener starts to make bubbles when your dough or batter is baking. As those bubbles raise the mixture up and give it the texture you want, the baking process solidifies the mixture around it.

Because these two things work differently, recipe writers use each of them for specific reasons. That means you might not get the results you want if you confuse them.

Confusing sugar and salt

You might be thinking this one is pretty self-explanatory, and it is — partially. The more baking you do, the more often you’ll see that recipes tend to require a lot more sugar than salt. So you can immediately see how confusing those amounts could drastically alter the flavor of your recipe.

In yeast-raised baked goods, salt and sugar do more than just flavor the end product. Salt helps to rein in the hungry yeast as it devours any sugars present in the dough and creates the delicious gas bubbles that help your breads to rise.

Confusing amounts of sugar and salt in yeast-raised recipes can have even greater consequences than other types of baked goods as a result. Too much salt and you can even kill the yeast — and dead yeast means your yeast-raised baked goods won’t rise.

Not understanding the differences that ingredient substitutions will cause in your finished product

The more comfortable you get with cooking and baking, the more tempting it is to make ingredient substitutions in recipes.

While there's less risk involved in doing this as you cook — because there's more science involved in baking — you can still go wrong if you don't understand how ingredient changes will affect your dish.

I'm not saying you shouldn't do it. Even failed experiments can be delicious — it doesn't have to matter that they didn't turn out how you planned.

Let's take fat in cookies. Many cookie recipes call for butter, but some might call for vegetable oil. Some might specifically call for olive oil. Can you substitute one type of fat for another?

You certainly can — if you're ready to accept that the cookies might turn out differently than you expected.

• Amazon Prime has over 100 million members globally, according to Jeff Bezos.
• Paying for a membership allows you to shop online quickly with free delivery.
• Whether Amazon Prime is worth it depends on how you weigh the pros and cons.

Over 100 million people worldwide think Amazon Prime is worth the cost.

In his latest letter to shareholders, CEO Jeff Bezos shared that Amazon Prime has more than 100 million members globally. The Wednesday news was the first time the company revealed how many people paid for the premium service. 

The 100 million figure is significant for Amazon Prime, the service which costs $12.99 a month or $99.99 for an entire year. With their membership, users get free and fast shipping on Amazon purchases, a large collection of books, songs, and movies, and other deals and exclusive offers.

However, that doesn't mean Prime's perks are worth it for everyone. It may not be for you, but it may also be perfect for you.

Below, weigh the pros and cons to see if joining the 100 million members of Amazon Prime is worth the cost.

SEE ALSO: Amazon Prime members can upload their outfits and get a fashion expert's opinion — here's what it's like to use in person

Pro: Free shipping

One of the initial perks of Prime and a cornerstone of the brand is the free shipping. For people who shop online a lot, shipping fees can really pile on. But Prime membership eliminates that cost for over 100 million items, with just a few exceptions.

Pro: Fast shipping

While two-day shipping is the Prime standard, other options can get your package home even sooner. Amazon has one-day and same-day shipping for millions of products in many cities and two-hour delivery for groceries and essentials. Prime users also get release date delivery for many new entertainment products.

Pro: Stream Prime Video

If you are bored with Netflix's offerings, you can check out Prime Video which is included with an Amazon Prime account. Streaming is available on any device for hundreds of movies and TV shows including Prime originals like "Transparent" and "Mozart in the Jungle."

Politically, Americans are highly divided.

When it comes to issues of race, immigration, national security, and environmental protection, they disagree about how the government should handle things like never before.

Relative to polls in the 1990s, Republicans are now much more likely to say poor people have it easy, while Democrats are less likely to say so. Conservatives are also more likely to say that environmental regulations are costing the US too many jobs. Liberals now seem less convinced that peace can be achieved through military strength than they were decades ago. 

The Pew Research Center reports that the country's political divisions now far exceed "divisions along basic demographic lines, such as age, education, gender and race." The share of Americans who sit in the middle of the political spectrum is lower, too.

Russian bots have taken advantage of these widening differences on Facebook and Twitter in an attempt to drive Americans' opinions further apart. 

But what in the brains of conservative and liberal voters actually drive their belief systems? Scientists have been researching the psychological differences between people with different stances, and there are a few key ways that people on opposite ends of the political spectrum see the world. Here's what the data shows:

SEE ALSO: A Yale psychologist's simple thought experiment temporarily turned conservatives into liberals

Being scared can make you more conservative.

Decades of research have shown that people get more conservative when they feel threatened and afraid.

Threats of terrorism make everyone less liberal — researchers found this was especially true in the months after 9/11. During that time, the US saw a conservative shift, and Americans displayed increased support for military spending and for President George W. Bush.

Americans aren't the only ones whose political leanings are influenced by fear. A 2003 review of research conducted in five countries looked at 22 separate tests of the hypothesis that fear fuels conservative viewpoints and found it was universally true.

A conservative brain is more active in different areas than a liberal one.

Brain scans show that people who self-identify as conservative have larger and more active right amygdalas, an area of the brain that's associated with expressing and processing fear. This aligns with the idea that feeling afraid makes people lean more to the right. 

One 2013 study showed conservative brains tend to have more activity in their right amygdalas when they're taking risks than liberals do.

On the other hand, feeling safe and endowed with strength might make you lean a little more liberal than you otherwise would.

Groundbreaking research that Yale psychologists published in 2017 revealed that helping people imagine they're completely safe from harm can make them (temporarily) hold more liberal views on social issues.

The authors of that study said their results suggest that socially conservative views are driven, at least in part, by people's need to feel safe and secure.

That finding didn't hold true for people with economically conservative views, though.

• After she ghosted a date, Amanda Burnett received a $40 invoice for her half of a dinner.
• According to an etiquette expert, it’s customary for the person who asked for the date to pay, but some people prefer to split the bill.
• If you offered to pay, it's decidedly not polite to send a bill after-the-fact.

When you go on a date, there's always a chance that it won’t be a romantic fit. It certainly feels lousy if you like someone and want the relationship to progress, but they don’t feel the same way … and it can be even more hurtful if you reach out and get ghosted.

But does that mean it's OK to send an invoice after the date?

It happened to Amanda Burnett, an Indiana woman who went on a dinner date and later received an itemized invoice of everything she ate and drank during the date, the Daily Mail reports.

Burnett shared the invoice on Twitter and, although the original tweet has been deleted, a screenshot of her caption said: "A guy just mailed me a bill for our dinner a few weeks ago because I didn’t text him back … I can't make this s**t up."

Her date didn't stop there — he also sent a text that said, "And to avoid additional penalty or fines have the invoice paid otherwise it will be turned into a collection agency," according to a screenshot published by Daily Mail.

The specifics of the situation, like whether Burnett offered to pay but her date declined, and who asked whom for the date, are unclear. But Business Insider reached out to Daniel Post Senning, great-great-grandson of etiquette expert Emily Post and spokesperson for The Emily Post Institute, to get his take on whether billing your date for their meal is acceptable.

SEE ALSO: Here is exactly what to say when you're not sure who should pay on a first date

1. It is customary that the person who asked for the date pays for it

"The traditional thing is that the host pays, so whoever asked the person out on the date would pay," Post Senning said. "But we’ve been living in a world where people for all different reasons like to split the bill in a relationship and on first dates."

However, he added that some people prefer the "traditional courtesy" of the host paying, and that in the past it was typically men doing the asking, and thus paying. If someone asked you out but you would feel more comfortable splitting the bill, you should mention that you’d like to contribute.

2. It's definitely not customary to send an invoice after you've agreed to pay

If everyone is operating under the understanding that this is a social situation, there are generally not going to be invoices involved, Post Senning said. "Part of having good etiquette is being able to read social cues. Sending an invoice sounds vindictive in some ways, because it's shifting the context from social to professional."

3. There is no obligation to respond to someone's texts or calls after a date — but it's the polite thing to do

We also don't know how the date ended. Burnett may have explicitly told him or given him signs that she wasn’t interested when they parted ways. We do know she didn't respond to his texts after the date.

Post Senning's take on ghosting? Although he says that there is not an "obligation to respond," it is the polite thing to do.

If you've spent a long time together, he recommends ending things in person, but if you met up for a quick drink or dinner, a simple text message or phone call will do. "Thanking someone for the time you did spend together is a good way to politely end an interaction," Post Senning said.

It can be hurtful not to put an end to things in words in a world where communication is so easy, he said.

There's little in this world more tear-jerking and wholesome than a home makeover show. The grateful smiles! The hugs! That exquisite mahogany finish!

Of course, there are some things that happen behind the scenes that aren't televised for a reason. From hidden costs to claims of fabricated storylines, shows like "Love It or List It,""Extreme Makeover: Home Edition,""Fixer Upper," and "Property Brothers" sometimes come with surprising caveats.

Although thousands of peoples' lives have been changed for the better from these shows, there are a number of aspects that viewers might not have expected — and that remodel contestants definitely didn't.

Here are seven secrets home makeover shows probably don't want you to know.

Even though it's reality TV, some of the shows may be scripted.

As with most reality shows, the word "reality" only loosely defines home makeover shows. According to Country Living, one Reddit user has family who disputes the authenticity of these shows. The user claimed that on "Love It Or List It," one couple recorded both endings of the show and "the network chose which one they thought was best." The ending that was shown on television supposedly differed from the homeowners' reality.

Host Hilary Farr has disputed this: "The show is not at all scripted," she said in an interview, "and the reactions of the homeowners to renovation realities and bad news is very real."

Of course, "Love It or List It" isn't the only show that has come under fire for a supposed lack of authenticity. Bobi Jensen, who appeared on "House Hunters," said that she was asked by producers to go along with a fake reason for getting a bigger house. She said they told her that her real reason was "boring and overdone."

Maintaining a new, expensive house isn't easy.

When the TV cameras, hosts, and contractors are gone, many families are left with stunning, enormous houses that they don't have the means to keep up with.

Property tax can increase exponentially, and maintenance and energy costs can skyrocket as a result of these shows. (After all, a new swimming pool, sparkling kitchen, and indoor tennis court don't come without a cost.)

India Dickinson won "Extreme Makeover: Home Edition," and said she suffered astronomical electric bills from her new 4,000-square-foot home. According to Screenrant, her family's electric bill "was around $200 before the makeover; now, in a good month, it's about $450 and it often ranges between $500 and $600."

Just because it's on TV doesn't mean it's totally free.

Allison Kaplan wrote about her experience on "I Hate My Kitchen" for Minneapolis-St. Paul Magazine, and stressed this point.

"Everyone assumes having your kitchen remodeled on TV makes it free," she wrote. "Not true. Every show is a little different. On 'I Hate My Kitchen,' the homeowners pay varied amounts depending on the project — sometimes they cover labor, and usually, appliances."

For "Income Property," host Scott McGillivray noted that furniture is not included in the homeowners' budget. "Some do end up purchasing the furniture and renting [their apartment] furnished," he revealed.

It's hard not to be in awe of waterfalls.

From their sheer beauty to their immense power, they're one of the most picturesque things in the natural world. And since most of us don't see them nearly as often as we'd like, it's even more special when we do.

Falls are sometimes found in remote locations, or they're difficult to get to, or only flow seasonally, so it takes a lot of planning to be able to glimpse a view.

If you need some travel inspiration, here are 27 waterfalls you need to see at least once.

Skógafoss, Iceland

Iceland's Skógafoss waterfall is easily one of the most stunning falls in the world, with rainbows appearing on most days. They can be viewed from the bottom or the top, after a 370-step climb. The tallest of the 26 waterfalls on the Skoga River, this 197-foot fall is especially unique because it flows directly from two glaciers.

Pearl Shoal Waterfall, China

Pearl Shoal Waterfall is located in China's Sichuan province, and is named for the pearl-like colors the thin water reflects in the sun when it flows over the shoal surface beneath it. The 130-foot falls are also tied to a fascinating legend of a young girl who pulled sacred water down from the mountain, creating the falls and a dense, beautiful forest.

Veliki Slap Waterfall, Croatia

Located near the border of Bosnia, Plitvice National Park is Croatia's first national park and home to more than a dozen waterfalls of varying sizes. The largest is the Veliki Slap Waterfall at 255 feet. Visiting in the winter will give you a different view, as the falls partially freeze and become surrounded by snow and ice.

For many teenagers, prom is a rite of passage. It's a night filled with corsages and boutonnieres, dresses and tuxedos, and plenty of photo-worthy moments.

Even though some of your favorite stars attended their high school prom long before the age of Instagram, Twitter, and Snapchat, they've shared throwback photos that give an idea of what the event looked like when they were teens. 

From talk show hosts like Ellen DeGeneres and Jimmy Fallon to young Hollywood stars like Bella Thorne and Paris Jackson, here's what they looked like at their high school prom.

Models Gigi Hadid and Bella Hadid went to prom together and had a blast.

Gigi and Bella are two of the most famous models. But back in 2013, they attended prom like other people their age. Based on the collage Gigi shared on Twitter, it's safe to say they enjoyed the event.  

Ellen DeGeneres shared the ultimate throwback from her high school prom.

Long before DeGeneres had her own talk show and won plenty of awards, she attended her high school prom in the '70s. 

In a photo shared on Instagram, the comedian clarified that the person wearing a plaid dress with a white collar is in fact her. 

Demi Lovato fulfilled a childhood promise that she made.

As Demi Lovato rose to fame with her roles on Disney Channel shows and movies, she carved out time to attend prom with a childhood friend. 

"A promise made in kindergarten finally coming true ... Prom with @nolannard!!! :)"Lovato wrote on Twitter. 

Disgraced former American cyclist Lance Armstrong on Thursday settled federal fraud charges against him for $5 million. The charges were related to his use of performance-enhancing drugs during his professional racing career.

It ended a protracted legal battle that involved former teammate Floyd Landis and the US government on behalf of the US Postal Service, Armstrong's Tour de France team sponsor from 1999 through 2005. Landis filed the original lawsuit — which had sought $100 million — in 2010 and is eligible for up to 25% of the settlement.

The deal came as the two sides prepared for a trial that was scheduled to start May 7 in Washington, The Associated Press reported. Armstrong said he was happy to have "made peace with the Postal Service."

For a decade, Armstrong was not only one of the world's most dominant athletes but also one of its most recognizable figures. Armstrong did what no one had ever done: He won the Tour de France seven times, and he did so consecutively from 1999 to 2005.

But that was all before the US Anti-Doping Agency found that his team had run "the most sophisticated, professionalized and successful doping program that sport has ever seen."

As we know now, Armstrong used a variety of performance-enhancing drugs, and all his wins in the greatest bicycle race were eventually stripped from him.

As recently as 2016 Armstrong still blasted USADA, calling it "one of the most ineffective and inefficient organizations in the world" and claiming its CEO, Travis Tygart, went after him only because he needed a case and a story.

Armstrong didn't act alone, and it was, darkly so, a team effort. A calculating tactician, Le Boss handpicked his teammates carefully, and together they were cycling's most successful team.

Several of the riders who served under Armstrong's tainted reign are still involved in the sport.

Here's a look at what he and his old teammates have been up to:

SEE ALSO: All Tour de France articles

An indelible image from the era was that of the US Postal Service's "Blue Train" setting a blistering pace at the front of the peloton, one that no one could match, let alone beat.

Levi Leipheimer was an all-rounder who rode with Armstrong on a few different teams at the Tour. He later admitted doping during his career.

Source: USADA

He now lives in Santa Rosa, California, where he runs a mass-participation bike ride. He also does promotion videos and coaches cyclists.

Sources: levination, Levi's GranFondo

• Meghan Markle and Prince Harry are getting married at St. George's Chapel, in Windsor, on May 19.
• Kensington Palace will cover the cost of the royal wedding, an expense traditionally taken on by the bride's family.
• The royal wedding is expected to cost in excess of $45 million (£32 million), most of which is allotted for security.

The average cost of a wedding for couples in the US and the UK is around $34,000 (£23,700).

Five figures is a huge expense for a one-day affair. That is, unless you're ultra-rich — and especially if you're royalty rich.

Next month, the world will bear witness to the most anticipated royal wedding in years. Meghan Markle and Prince Harry are set to be married on May 19 at St. George's Chapel, in Windsor, and will begin a carriage procession immediately after the ceremony. Their reception will take place later on the grounds of Windsor Castle.

Kensington Palace will cover the cost of the wedding, an expense traditionally taken on by the bride's family.

The case was the same for Kate Middleton and Prince William's 2011 royal wedding— the only item Middleton paid for was her six-figure Alexander McQueen dress. Their total wedding celebration cost $34 million (£23.7 million).

Markle and Prince Harry's wedding will reportedly cost in excess of $45.8 million (£32 million), according to Bride Book's estimation.

The venue is the biggest part of a typical wedding budget for couples in the US and the UK, taking up nearly half of the entire wedding cost. Access to St. George's Chapel — and St. George's Great Hall, where the wedding reception will take place — is free of charge for Markle and Prince Harry. Transportation is also free, thanks to the Queen's fleet of Rolls-Royces, Daimlers, and Bentleys.

The greatest cost for the royal couple? Security. Protecting Markle and Prince Harry, plus thousands of guests and onlookers, will run Kensington Palace a whopping $43 million (£30 million), estimates Bride Book. That includes the cost of snipers, undercover police, military technology, and security drones. The bulk of Kate Middleton and Prince William's wedding budget similarly went to security costs. 

Otherwise, Markle and Prince Harry's total wedding spend, including food, cakes, entertainment, wardrobe, and the honeymoon, amounts to about $2.8 million.

Below, check out Bride Book's breakdown of what the royal wedding will cost.

SEE ALSO: Prince Harry and Meghan Markle will have to file US taxes once they get married — and that could spell trouble for the royal family

DON'T MISS: Here's what time Prince Harry and Meghan Markle's royal wedding will start where you live

Food and drinks — $686,000 (£479,000). Catering is needed for both the formal lunch reception and the dinner reception for friends and family. Top-shelf champagne, wine, and whiskey will likely come from the Royal Palace cellars. The Royal Family’s favorite champagne, Bollinger, goes for nearly $115 (£80) a bottle; that's approximately $195,000 (£136,000) spent on champagne alone.

Source: Bride Book

Wedding dress — $430,000 (£300,000). The rumor mill is working overtime when it comes to Markle's dress, which will reportedly have a six-figure price tag and be paid for by the bride herself. A fashion icon in the making, Markle is expected to go with a traditional design and unique detail.

Source: INSIDER

Marquee — $500,000 (£350,000). Even though Markle and Prince Harry are using St. George's Chapel free of charge, they'll need a large event tent to host guests on the grounds after the immediate reception in St. George's Great Hall.

Source: Bride Book

• Experiencing a culture's food is one of the most enjoyable parts of travel.
• Amir Benesh, CEO of LVH Global, works with clients whose net worth is between $30 million and $4 billion.
• Many wealthy travelers Benesh works with typically choose places to eat based on quality of food and exclusivity.

Amir Benesh, the CEO of LVH Global— a luxury home rental service that sets up ultra wealthy travelers in mansions, villas, and yachts during their luxurious vacations — knows a thing or two about how the rich like to travel.

"The typical net worth of our clients is between $30 million to $4 billion," Benesh told Business Insider. Most of their clients have an average annual income of $5 million.

A major part of traveling for anyone is experiencing the local food. However, for the ultra rich, getting a reservation at an exclusive spot might be a priority on their list of to-do's.

Benesh has seen many requests come through when it comes to where his clients want to eat. "As for restaurants, the ultra wealthy look for quality food, [and] mostly hype," he said.

"Those two often go hand-in-hand. People like to feel special. So getting into a place that has a reputation of being 'impossible' to get into makes gives people a sense of exclusivity," Benesh said.

Ahead, see where dinner reservations are being made across the world for the ultra wealthy, according to Benesh.

SEE ALSO: Forget the Four Seasons and The Ritz-Carlton: The most luxurious hotel brands in the world are ones you've likely never heard of

DON'T MISS: The new Ritz-Carlton luxury cruise ships for the '1% of global travelers' look like incredible super yachts — and you can start booking next month

Catch L.A. — Los Angeles, California

This West Hollywood restaurant offers seafood towers starting at $99 and bone-in Ribeye for $105. 

Chef's Table at Brooklyn Fare — Brooklyn, New York

A three-Michelin star restaurant, Chef's Table is Japanese inspired, and offers a $394.36 tasting menu.

Alinea — Chicago, Illinois

Alinea is one of the world's best restaurants and serves a multi-sensory, 16- to 18-course menu in the The Gallery Menu and it costs $285 to $345 per person, depending on the day of the week. 

• Most foods are safe well beyond their use by, best by and sell by dates.
• After cutting away mold, hard foods such as Parmesan cheese can still be consumed.
• If meat changes color in your fridge or freezer, that alone is not an indication that it's spoiled.

If you have trouble deciphering the difference between food safety and food quality, you're not the only one.

Food waste not only costs American families hundreds of dollars a year, it's also the single largest component found in landfills across the country. And most of the time, pounds and pounds of food are thrown away merely due to confusion.

How long after an expiration date can you still eat a product? Does one small spot of mold mean a cheese has spoiled? Is discoloration a sign that meat has gone bad? The answer to most of these questions is it depends.

But here are 10 things to remember next time your questioning if something is safe to eat or not.

1. "Use by" and "Best by" dates merely indicate freshness

Whether you're dealing with canned vegetables, a bottle of beer or a jar of mustard, most products remain safe to eat well beyond their “use buy” or “best buy” dates. For example, canned soups can sometimes last up to five years without spoiling, according to food safety specialists.

Use by and best by dates are dates the manufacturer deems a product reaches its peak quality or best flavor. They are placed on products with very little regulation and do indicate a food is no longer safe to eat, according to the US Department of Agriculture.

2. "Sell by" is intended for retailers, not consumers

If you take into account a product's "sell by" date while grocery shopping, it's time to lose that habit. Just because you're eating something with a two-month-old "sell by" date, does not mean it has expired.

"Sell by" dates aren't intended for you. They're supposed to help retailers ensure proper turnover so products still have a long shelf life after you buy them, according to the US Department of Agriculture.

Still, 91% of consumers occasionally throw food away based on the "sell by" date out of a mistaken concern for food safety, according to a study by Harvard Law and the Natural Defense Council. Those researchers argue this date should not even be visible to consumers because the confusion around it causes large quantities of food waste.  

3. You don't need to throw out bruised produce

Don't let your eyes fool you when it comes to bruised fruits and vegetables. Just because a banana or an avocado isn't flawless, doesn't mean it should be sentenced to the trash can.

According to Michigan State University, a bruise is simply a sign of cell damage and exposure to air. The reaction can make the fruit or vegetable softer and mushy, but it doesn't pose a health hazard. If you want to pick away the bruised section of your banana for aesthetic reasons, go for it. But if you decide to eat it in spite of its flaws, you'll survive just the same.

Former FBI director James Comey's memos are out.

Shortly after the Justice Department sent copies of former FBI director James Comey's memos to Congress at the request of a group of House Republicans, news organizations got ahold of the 15-page, partially redacted documents.

The memos, which detail private conversations Comey had with Donald Trump before and after he took office, outline interactions with Trump that Comey found to be questionable.

Here are the biggest revelations from Comey's memos:

Trump railed against Andrew McCabe

According to Comey, Trump blasted former FBI deputy director Andrew McCabe and referred to him "your guy" in conversations with Comey, on several occasions.

"He asked (as he had at our dinner) whether my deputy had a problem with him, and recounting how hard he had been on the campaign trail," Comey wrote in the memo. 

Trump bristled at McCabe frequently throughout his first year in the White House, often taking aim at him and his wife on Twitter.

Comey responded to Trump's comments by giving McCabe a positive assessment: "I again explained that Andy McCabe was a pro," Comey said in the memo.

McCabe was fired in March, amid an internal investigation over the manner in which he conducted himself during the FBI's Hillary Clinton email probe.

Trump said Mike Flynn had 'serious judgment issues.'

According to Comey, Trump complained about former national security adviser Mike Flynn by saying "the guy has serious judgment issues."

During a dinner, Trump recalled a conversation where Flynn had not properly informed him of a congratulatory call from a world leader after his inauguration.

"In telling the story, the President pointed his fingers at his head and said 'the guy has serious judgment issues,'" Comey said in the memo.

Russian President Vladimir Putin told Trump that his country had 'some of the most beautiful hookers in the world.'

Comey wrote that he and Trump discussed a salacious rumor that Trump allegedly entertained prostitutes and witnessed a sexual act while in a Moscow Ritz-Carlton hotel room in 2013.

"The President said 'the hookers thing' is nonsense," Trump said at the time, according to Comey, "but that Putin had told him 'we have some of the most beautiful hookers in the world."

Comey qualified his account and said that Trump "did not say where Putin had told him this."