1

A renovation project saved thousands of lives on 9/11

On September 11, 2001, American Airlines Flight 77 struck the Pentagon at 9:37 a.m., killing 189 people. Few people know this part: the death toll could have been much higher. But there was a renovation project underway at the time of the attacks.

The Pentagon’s five-sided structure is divided into five "wedges," and workers had been renovating them one at a time. Flight 77 struck the wedge that had just been completed. Of the 4,500 people who normally worked in that section, only about 800 had moved back in. Without the reinforced construction and the incomplete occupancy, experts believe the casualties would have been catastrophically higher.

2

The Cold War and the hot dog stand

In the middle of the Pentagon’s five-acre center courtyard once stood a modest hot dog stand. According to a Cold War legend (one still retold by official Pentagon tour guides on every public tour), between the 60s and the 80s, Soviet satellite images tracked large groups of high-ranking military officials converging on that small building at the same time every day.

Soviet intelligence reportedly concluded the structure must be the entrance to some underground bunker in America. In reality, all it did was sell lunch. In 2006, the original stand was torn down, and a sandwich shop was built in its place.

3

Its construction began on September 11th, exactly 60 years before the attack

Builders broke ground on the Pentagon on September 11, 1941. That was exactly 60 years to the day before the September 11, 2001, terrorist attacks that would strike the same building.

Construction had been ordered by Army Brigadier General Brehon Somervell, who wanted a permanent headquarters for the Defense Department to replace its then-17 scattered offices across Washington, D.C.

The project was extraordinarily ambitious: plans called for the world’s largest office building to be completed in just 16 months. In the end, the conception, design, and construction of the entire Pentagon building took a total of 15 months.

4

The same person oversaw its construction and the Manhattan Project

Colonel Leslie Groves of the Army Corps of Engineers took charge of Pentagon construction in August 1941. He worked six days a week and drove his team relentlessly, at one point employing more than 15,000 workers around the clock.

When the Pentagon was finished in January 1943, Groves was assigned to lead the Manhattan Project, America’s secret program to build the atomic bomb . His deputy, Captain Robert Furman, followed him into the Manhattan Project as chief of foreign intelligence. Together, the men who built the world’s largest office building went on to produce the weapon that ended World War II.

5

Why is it shaped like that?

The Pentagon’s iconic five-sided shape was the consequence of a geographic accident. The original site selected for the building, near Arlington Cemetery, **happened to be bordered on five sides by roads. **Architects designed the structure to fit those boundaries, producing a pentagonal floor plan. Then President Franklin D. Roosevelt intervened: worried the massive building would obstruct the view of Washington, D.C. from Arlington, he ordered the site moved to its current location along the Potomac River. But the five-sided design had already been drawn up, and nobody changed it.

6

It was the first desegregated building in Virginia

When the Pentagon was designed in 1941, segregation was the law in Virginia. Original plans called for doubled bathroom facilities: separate ones for Black and white employees, as required by Virginia statute. But President Roosevelt had signed Executive Order 8802 in June 1941, prohibiting racial discrimination in federal employment and government contracting.

As a federal building, the Pentagon was exempt from Virginia law. It became the only building in the state where segregation was not enforced. A fully desegregated federal workplace that opened in 1943. The doubled bathrooms were built anyway, as the plans were too far along to revise, but were never used as separately designated spaces.

7

Its construction was surprisingly frugal and incredibly fast

Ground broke on September 11, 1941, and construction finished on January 15, 1943, just 16 months later. More than 15,000 workers were on site around the clock. Wartime office shortages were so severe that employees moved into completed wings before the rest of the building was finished. Steel was too scarce to use extensively, so builders relied almost entirely on reinforced concrete. The 689,000 tons of sand and gravel required came directly from the nearby Potomac River, cutting transportation costs. The project was budgeted at $35 million, but the final bill was $63 million, which would translate to over $900 million in today’s dollars.

8

You can walk between its farthest points in only 7 minutes

The Pentagon is the world’s largest low-rise office building: 6.5 million square feet of space, which is three times the total floor area of the Empire State Building. Each of its five outer walls is 921 feet long. It has 7,754 windows and 17.5 miles of corridors. Approximately 26,000 military and civilian employees report for work there every day.

Despite that scale, the building’s concentric ring design is so efficient that it takes only about seven minutes to walk between its two farthest points.

9

The man who secretly lived inside its walls

During construction, Colonel Groves drove his deputy, Captain Robert Furman, so relentlessly that Furman rarely left the building. To cope, Furman had contractors build him a small, windowless apartment hidden inside the walls of the Army’s Ordnance Division. In this private room, he could sleep and shower without leaving the premises.

When construction ended and personnel dispersed, knowledge of the hidden room was never passed on to building management. Months later, when Furman returned to Washington on Manhattan Project intelligence business, he found the apartment undiscovered and exactly as he’d left it.

For over a year, he would slip back to the Pentagon, pop open a wall panel, spend the night, and emerge in the morning with his suitcase. He was finally caught in 1943 and forced to surrender the keys. It was never disclosed whether the secret apartment was maintained or eventually absorbed back into the official floor plans.

10

It houses over 30 restaurants, including everyone's favorite chains

The Pentagon feeds roughly 26,000 people a day, and its dining options read less like a military headquarters and more like a mall food court. The main Concourse Food Court, which opened in September 2009 and seats 875 people, is the largest of several dining areas.

Confirmed chains currently inside the building include McDonald’s, Five Guys, Subway, Popeyes, Starbucks (multiple locations), Dunkin’ (two locations), Panera Bread, Taco Bell, Panda Express, Baskin-Robbins, Potbelly, Jamba Juice, and Moe’s Southwest Grill, among others. The building also houses a CVS pharmacy, a florist, a jeweler, and a dry cleaner. In the summer of 2024, Potbelly became the first restaurant to open in the center courtyard. Yes, the very spot where the legendary Cold War hot dog stand once stood.

1

He served hot dogs to British Royalty

In 1939, for the first time ever, a sitting US president hosted the reigning British monarchs on American soil. And it wasn’t just a formal state meeting; it was a picnic.

On June 11 of that year, President Franklin D. Roosevelt and First Lady Eleanor Roosevelt welcomed King George VI and Queen Elizabeth to their home in Hyde Park, New York. Instead of an elaborate diplomatic banquet, the menu was unexpectedly simple and quintessentially American: hot dogs and beer. According to FDR, the queen politely tried hers with a knife and fork, while the king ate several with his hands and seemed to enjoy them. Behind the scenes, the visit was more than symbolic, yet folksy hospitality. With war already looming in Europe, both sides were quietly strengthening ties that would soon become crucial during WWII.

2

The first sitting president to fly on a plane

While FDR made history in many ways, one of his lesser-known firsts took place thousands of feet above the ground.

On January 11, 1943, in the middle of WWII, he became the first sitting US president to fly in an airplane. At a time when air travel was still far from routine, he embarked on a secret 7,000-mile journey from Miami, Florida, to Bathurst, Gambia, before continuing to Casablanca, Morocco. The trip wasn't taken for leisure; German U-boats had made Atlantic sea travel risky, so Roosevelt crossed the ocean aboard a Boeing 314 flying boat known as the Dixie Clipper . His destination was the Casablanca Conference, where he met with British Prime Minister Winston Churchill to discuss wartime strategy.

3

Highly superstitious

Are you the type to knock on wood to avoid bad luck? Or would you walk under a ladder without a second thought? If you're in the first group, you would have fit right in with Franklin D. Roosevelt.

FDR famously declared that "the only thing we have to fear is fear itself," but he also had a surprisingly superstitious side. According to people who worked with him in the White House, Roosevelt kept his desk and personal items arranged in a precise order that he believed brought good luck. He also disliked the number 13: family members and aides recalled that he avoided hosting dinners with 13 guests and was reluctant to begin important trips on Friday the 13th. He even had a lucky charm, a brown felt fedora that he wore during all four of his presidential campaigns. We can't say it didn't work.

4

He loved practical jokes

With all his responsibilities, talents, and interests, FDR still found time to joke around.

According to his biographers, Roosevelt loved practical jokes and kept his playful streak throughout his life, even pulling pranks well into his presidency. In the tense world of politics, that sense of humor became one of his trademarks. He enjoyed classic gags, including putting bubbling powder in drinking glasses to surprise White House guests, or slipping completely made-up words into conversations and then watching with delight as his staff scrambled to check the dictionary. Friends and aides also noted that he had a unique ability to laugh off rumors, criticism, and political attacks that might have rattled other leaders.

5

Peculiar work schedules

Jokes didn't distract FDR from his work. If anything, they helped him cope, and he certainly had plenty of work to do. In fact, Roosevelt was known for his unusual working hours.

Unlike many other presidents who were early risers, he often worked late into the night and typically didn't begin his day until around 9 am. During WWII, while overseeing a global conflict, he regularly spent his evenings reviewing reports, making decisions, and meeting with advisers long after most Americans had gone to bed. What makes this even more impressive is that he maintained this pace as his health steadily declined. Doctors urged him to slow down and limit his workload, but Roosevelt frequently ignored that advice. For a wartime commander-in-chief, there was always one more decision to make.

6

He appointed the first female cabinet member

Among his many historic firsts, FDR was the inaugural POTUS to appoint a woman to a Cabinet position, a decision that reflected both his political instincts and his willingness to recognize talent and intelligence where he found it.

In 1933, he chose labor advocate Frances Perkins as Secretary of Labor. It turned out to be one of the most consequential appointments of his presidency. Perkins served from 1933 to 1945, making her the longest-serving Secretary of Labor in American history. And as if that weren't enough, she became one of the chief designers of the New Deal.

7

11 presidential relatives

Most people know that Franklin D. Roosevelt and Theodore Roosevelt were related: the 32nd president was a distant cousin of the 26th. But few realize just how extensive FDR’s presidential family tree really was.

In fact, genealogists have traced Franklin Roosevelt’s family connections to at least 11 US presidents. FDR was not only related to Theodore Roosevelt and his own wife, Eleanor Roosevelt (his fifth cousin once removed), but also to an impressive number of other commanders in chief. Among those connected to him by blood were George Washington (with whom he shared ancestors from English nobility and the early settlers of Virginia), John Adams, John Quincy Adams, James Madison, and William Harrison. Through marriage and extended family ties, he was also related to Ulysses S. Grant, Benjamin Harrison, Zachary Taylor, Martin Van Buren, and William Howard Taft.

8

His illness may not have been polio

As is well known, FDR was struck by a serious illness in 1921 at age 39 that left him permanently unable to walk unaided. But during his presidency, he worked hard to keep public attention focused on his leadership rather than on his body, so while Americans understood he had been diagnosed with polio, few knew about the paralysis.

To stand at public events, Roosevelt relied on heavy steel leg braces and canes that helped him project confidence and strength throughout his presidency. However, although doctors at the time diagnosed him with polio, some modern medical researchers have suggested that his symptoms may have been more consistent with Guillain-Barré syndrome (GBS), a rare autoimmune disorder.

9

He didn’t graduate from law school

FDR was a bright and curious man who threw himself into subjects that fascinated him, but when something failed to hold his interest, he wasn't afraid to move on.

After earning a History degree from Harvard University in 1903, he enrolled at Columbia Law School, but he found that he simply didn't enjoy it. According to the Miller Center at the University of Virginia, Roosevelt showed little enthusiasm for the legal profession, and maybe that’s why he never achieved a Law degree. Even so, he passed the New York bar exam and began practicing after it, but the experiment lasted only a few years. Then, in 1910, an opportunity came along that interested him far more: local Democrats in New York asked him to run for the state Senate. Roosevelt eagerly accepted, and his political career was underway.

10

Expert in many fields

Politics and wartime strategy weren't FDR's only talents. Long before he entered the White House, he acquired a deep interest in nature.

Growing up in Dutchess County, New York, Roosevelt developed a fascination with birds that went far beyond a childhood hobby. By age 11, he was already learning taxidermy, eventually becoming a skilled self-taught naturalist and bird expert. Over the years, he identified and cataloged roughly 300 bird species. His detailed field journals and collection of more than 300 Dutchess County specimens are still considered some of the most complete records of local bird life from that era.

1

It was invented in Switzerland

While the name suggests a US origin, the technology that created American cheese actually began in the heart of the Alps. It was developed in 1911 by Swiss researchers Walter Gerber and Fritz Stettler, who were looking for a way to extend the shelf life of their country’s famous Emmental cheese.

The problem with traditional cheese is that it eventually dries out, molds, or separates into a greasy mess when heated. By shredding the cheese, adding sodium citrate, and heating it, the Swiss duo discovered they could create a stable, smooth product that didn't separate. While they weren't trying to create "American" cheese as we know it today, their emulsification process laid the foundational science for every single-wrapped slice produced today.

2

It was popularized by a Canadian

The man responsible for the global dominance of American cheese was James L. Kraft. Ring any bells? Kraft was a Canadian immigrant who moved to Chicago in 1903. While he didn't invent the concept of processed cheese, he perfected the industrial scale of its production and marketing.

Kraft noticed that retailers struggled with cheese spoilage; if a wheel of cheddar didn't sell quickly, it was a total loss. He experimented with various methods of heating and blending cheese until he found a formula that could be canned and shipped long distances without spoiling. In 1916, he received a patent for his "processed cheese," and during World War I, the U.S. government purchased millions of pounds of it for soldiers, cementing its privileged place in the American diet.

3

It was almost called "Embalmed Cheese"

When processed cheese first hit the market, it had its detractors. Traditional cheesemakers were horrified, and so were pure food advocates. These critics argued that the product shouldn't even be called cheese. They’ve even gone so far as to call it "embalmed cheese" because of its unnaturally long shelf life and the chemical emulsifiers used to keep it stable. Yet, Kraft’s marketing prowess and the sheer convenience of the product ultimately won the naming battle. At least in the court of public opinion.

4

Technically, it isn’t cheese

Kraft may have won the battle among the people, but legally, American cheese is not considered cheese. If you look closely at the packaging, you will rarely see the word "cheese" on its own. Because of strict FDA regulations, most varieties are legally classified as "Pasteurized Process Cheese Product" or "Pasteurized Process American Cheese Food."

To be labeled "cheese," a product must be made primarily of milk, salt, and enzymes. Processed American cheese, however, is made by blending real cheese—usually cheddar or Colby—with emulsifying salts, whey, and sometimes extra milk or fats.

5

Any cheese can be made into American cheese

The term "American cheese" refers more to a process than a specific flavor. In theory, you could make "American-style" brie, blue cheese, or parmesan. The defining characteristic is the addition of an emulsifier, which breaks down the proteins and allows the fats and water to stay together.

In fact, some high-end chefs now make their own artisanal American cheese with aged cheddars processed with sodium citrate to create a slice that has the complex flavor of an expensive block but the melting point of a Kraft Single.

6

It isn’t naturally yellow

The vibrant orange-yellow hue of American cheese is entirely a cosmetic choice. Traditionally, cheese color varied by the season; when cows ate fresh grass in the summer, their milk contained more beta-carotene, leading to a naturally yellowish cheese. To make their cheese look high-quality all year round, cheesemakers began adding dyes.

American cheese takes this tradition to the extreme. It is typically colored with annatto, a seed from the achiote tree. Without this dye, American cheese would be a pale, creamy white, which is how it is sold in many delis as "White American". Yes, that’s right, there is no flavor difference between the white and yellow versions.

7

It has an extremely low melting point

The scientific superpower of American cheese is its meltability. Traditional cheeses have a protein structure that tightens when heated, which is why a slice of aged cheddar on a burger often results in an oily puddle and a rubbery clump.

Because of the emulsifying salts, the proteins in American cheese can withstand heat without clumping together. This gives it an incredibly low and stable melting point, transforming the slice into a silky sauce. This is why it remains the undisputed king of grilled cheese sandwiches.

8

It’s been in space

When you're hurtling through orbit in a cramped capsule, you need food that is stable, easy to eat, and won't crumble into thousands of tiny, electronics-clogging pieces. American cheese fit the bill perfectly for early NASA missions.

Processed cheese in tubes or cubes was a staple of the Apollo missions. Because it doesn't separate or sweat oil in varying temperatures and pressures, it was one of the few dairy products that could reliably provide flavor and calcium to astronauts.

9

It helped bring cheese to the masses

Before the advent of processed cheese, cheese was often a seasonal luxury. It was difficult to transport, expensive to store, and highly variable in quality. James L. Kraft’s invention changed that. By creating a product that was uniform in flavor and shelf-stable, he made cheese affordable and accessible to every corner of the United States.

10

The U.S. Government once gave it out

The U.S. government not only bought tons of American cheese during World War I. In the 1980s, the term "government cheese" became a thing. During a period of dairy surpluses, the government bought millions of pounds of cheese to prop up prices for struggling farmers.

To avoid letting it rot, the Reagan administration began distributing five-pound blocks of cheese to low-income families, seniors, and schools. For many who grew up in that era, that pale orange processed cheese was a lifesaver.