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

Who fired the shot heard ‘round the world?

The war began on the morning of April 19, 1775, when a small group of local militia faced a column of British Redcoats. The American commander, Colonel John Parker, ordered his men to disperse. The British commander, Major John Pitcairn, ordered his troops to hold their fire. Both sides wanted to avoid a bloodbath.

Suddenly, a shot of gunfire was heard through the air. In the confusion, British soldiers charged with bayonets. Who pulled that first trigger? Some accounts suggest a gunman fired from behind a nearby wall. Others claim a fleeing prisoner sparked the chaos. Because both sides swore under oath that they didn’t shoot first, the catalyst of the war remains a mystery.

2

Who betrayed Nathan Hale?

Nathan Hale is considered one of America’s first tragic heroes. A young Connecticut schoolteacher turned army captain, Hale volunteered to infiltrate British-occupied New York City to gather intelligence. He was an amateur spy, and it didn’t take long for the enemy to catch him with compromising notes hidden in his shoes. He was hanged the next morning, at age 21.

The mystery lies in exactly how he was caught. One theory points to his own cousin, Samuel Hale, a Loyalist who allegedly spotted Nathan in a tavern and reported it to British authorities. Another theory suggests he was tricked by Major Robert Rogers, a legendary British counter-insurgency commander who supposedly suspected Hale and got him to confess his mission over drinks.

3

Who burned New York City in 1776?

On September 21, 1776, just days after Nathan Hale’s execution, a fire broke out in the middle of the night. The Great Fire consumed a third of New York City, destroying hundreds of buildings and critical port facilities just when the British military was going to start using the city as their winter base.

The British blamed American arsonists and arrested over 200 people, but no one was ever convicted. Interestingly, George Washington and his collaborators previously debated burning the city, though the Continental Congress ultimately forbade it. Washington publicly denied any involvement, although he privately confessed that the fire was a stroke of luck. Was it a genuine accident, or did radical Patriots take matters into their own hands?

4

Who was Agent 355?

George Washington’s most successful intelligence network was the Culper Spy Ring, which operated in New York. The ring used an intricate system of invisible ink, hidden drop boxes, and complex ciphers. In their master codebook, the number 355 stood simply for "lady."

Agent 355 was a brilliant female operative who provided vital intelligence. Because her identity was protected by the ring’s leaders, her true name was never written down. Scholars have spent centuries debating whether she was a prominent Loyalist society woman secretly sympathetic to the Patriots, a member of the prominent Floyd family, or a composite character representing multiple female informants.

5

The mystery of Silas Deane

Silas Deane was a Connecticut merchant sent by Congress to France in 1776 as America’s first secret diplomat. He performed well at first, successfully securing shipments of French arms and recruiting foreign officers such as the Marquis de Lafayette. However, he fell into a bitter political dispute with fellow diplomat Arthur Lee, who accused Deane of financial fraud.

Totally in disgrace, a ruined Deane spent years in European exile trying to clear his name. In 1789, when he was 51, he boarded a ship to return to the United States for a congressional hearing. Hours into the voyage, he became ill and died. According to rumors, he had been poisoned. Modern historians suspect his close friend and assistant, Edward Bancroft—a British double agent—murdered Deane to keep him from exposing his wartime espionage.

6

Who told the Patriots in Boston that the British were coming?

Before Paul Revere could take his historic midnight ride, someone had to give the Patriots the warning. On the night of April 18, 1775, Dr. Joseph Warren received precise intelligence that British troops were preparing to march on Lexington and Concord to arrest rebel leaders.

Who leaked this military plan? History has pointed to Margaret Kemble Gage, the American-born wife of the British Commander-in-Chief, General Thomas Gage. Margaret was torn between her love for her husband and her devotion to the land. While her involvement has never been proven, General Gage notably sent his wife away to England shortly after the leak.

7

Was Charles Lee a traitor?

General Charles Lee was George Washington’s second-in-command and an experienced military officer. He was also arrogant and frequently criticized Washington’s leadership. In late 1776, Lee was captured by the British in a New Jersey tavern while writing a letter complaining about Washington's deficiencies.

He was exchanged back to the Americans a year later, but his career ended after he disobeyed Washington’s orders at the Battle of Monmouth in 1778. The mystery arose 80 years later, when a lost document surfaced. The document, written in Lee’s own handwriting, outlined a detailed military strategy for the British to defeat the Continental Army. Was Lee a traitor, or was it a strategy to manipulate his captors?

8

Why didn’t the British burn Monticello?

In June 1781, the British cavalry leader Banastre Tarleton—called by Americans "Bloody Tarleton" for his brutal tactics—led a raid on Charlottesville, Virginia. His main objective was to capture Thomas Jefferson, the author of the Declaration of Independence and the state’s governor.

Jefferson managed to escape Monticello, and when Tarleton’s troops occupied his famous estate, they left it entirely untouched, as Tarleton specifically ordered his men not to damage or burn the property. Given that the British often burned the properties of prominent leaders, sparing Monticello was very unusual.

9

Who was Jane McCrea?

Jane McCrea was a young woman from a Loyalist family who was engaged to a lieutenant in the British army. In the summer of 1777, she was taken by Native American warriors allied with British General John Burgoyne's advancing army. Shortly after, she was found dead and scalped.

The Patriots turned her death into a propagandistic victory, using the story to terrify frontier colonists into joining the militia. But who actually killed Jane? The native scouts claimed she was accidentally shot by stray bullets fired by pursuing American soldiers. Other accounts insisted she was murdered during an argument between two native factions. The truth remains buried in the fog of war.

10

What happened to Benjamin Church?

Dr. Benjamin Church was a prominent member of the Boston Sons of Liberty and served as the first Surgeon General of the Continental Army. He was also a traitor. In 1775, Washington’s intelligence team intercepted a coded letter written by Church containing vital information about American troop numbers.

Church was arrested, tried, and sentenced to confinement. In 1778, because of his poor health, he was banished from Massachusetts and boarded a merchant ship bound for the West Indies. The ship sailed into the Atlantic and was never seen again. Did the vessel sink, or did Church use his British connections to stage his disappearance and flee to Europe?

1

George Washington

Image: Alonzo Chappel, CC0, via Wikimedia Commons

Founding Father and first president of the United States, George Washington, enjoyed many recreational activities during his free time. He was a true outdoorsman—he loved hunting and fishing and was a devoted gardener and farmer .

It’s common knowledge that after deciding not to run for a third term, he retired to his Virginia farm and dedicated the rest of his life to farming. But one fact you may not know is that, in his youth, Washington was a frequent dancer —and rumor has it, he was even extremely good at it! He considered dancing an important social interaction, describing it as "so agreeable and innocent an amusement."

2

Franklin D. Roosevelt

Image: National Archives and Records Administration, Public domain, via Wikimedia Commons

Franklin D. Roosevelt, the only president to be elected to four consecutive terms, led the country through the critical years of the Great Depression and World War II. To maintain a clear mind while navigating such tumultuous times, Roosevelt embraced a number of pastimes. He collected books , stamps , and ship models , for example.

In addition, he was an avid swimmer . After losing the ability to walk due to polio, Roosevelt began swimming three times a week to strengthen his muscles. Following his election, the New York Daily News donated a swimming pool to the White House so he could continue his practice.

3

James A. Garfield

Image: Unknown; part of Brady-Handy Photograph Collection., Public domain, via Wikimedia Commons

Before becoming the 20th president, James A. Garfield enjoyed fishing , hunting , and playing billiards . But he was also exceptionally intelligent and studious.

Though many people may know Garfield for serving just four months in office, he was also the first ambidextrous president of the United States . Not only could he write with both hands, but when asked a question, he could simultaneously write the answer in ancient Greek with one hand and Latin with the other. Pretty impressive, don’t you think?

4

Calvin Coolidge

Image: National Photo Company Collection, Public domain, via Wikimedia Commons

The 30th president of the United States liked riding horses so much that he had an electronic horse installed in the White House. The device had two speeds—trot and canter—and he rode it every day.

That said, Calvin Coolidge was a taciturn man of few words, who enjoyed taking afternoon naps, earning him the nickname "Silent Cal." He also had a very particular sense of humor . He reportedly enjoyed pressing the alarm buttons in the Oval Office or hiding in the garden shrubbery to startle his Secret Service agents.

5

Jimmy Carter

Image: Tuntematon, Valkoisen talon valokuvaajat (01/20/1977 - 01/20/1981), Public domain, via Wikimedia Commons

Throughout his life, Jimmy Carter was a curious man who never stopped doing things. He studied nuclear physics in college, could read two thousand words a minute, wrote numerous books, and even won a Nobel Peace Prize in 2002.

But what did this brilliant man like to do in his spare time? Carter had a variety of hobbies, including painting , poetry , tennis , cycling , fly fishing , and skiing . However, the one activity in which he perhaps excelled most was woodworking . After retiring, the 39th president of the United States set up a garage workshop on his Georgia ranch, where he built furniture that was later auctioned to benefit the Carter Center.

6

John Quincy Adams

Image: Pieter Van Huffel, 1769 - 1844, CC0, via Wikimedia Commons

John Quincy Adams was notoriously meticulous and kept a diary detailing his daily routine. Thanks to this, we now know that the sixth president of the United States liked to relieve the stress of the presidency with an early morning swim .

After waking up around 4 or 5 a.m., Adams would walk two miles to the Potomac River and leave his clothes on the shore before taking a swim. According to lore, one morning, a reporter named Anne Royall snatched his clothes and demanded that the president give her an interview. Adams had no choice but to answer her questions while standing deep in the river, completely naked.

7

Harry S. Truman

Image: Abbie Rowe, Public domain, via Wikimedia Commons

Harry S. Truman governed the United States from 1945 to 1953, right after World War II—a difficult and stressful time, to be sure. To blow off some steam, the 33rd president liked to immerse himself in one of his two long-time passions: reading and music .

Truman had eye problems, which prevented him from participating in sports. As a result, he became an avid reader from an early age—in fact, he once boasted of having read every book in the library by the age of 14. He was also a very skilled piano player , having started lessons at the age of seven.

8

Lyndon B. Johnson

Image: Yoichi Okamoto, Public domain, via Wikimedia Commons

Living up to the legacy of one of the most popular presidents in American history can't be easy. But it appears that the 36th president of the United States knew just how to maintain a good balance between responsibility and leisure. During his five-year administration, Lyndon B. Johnson spent 490 days —about a quarter of his presidency— at the LBJ Ranch in Stonewall , Texas, combining work and vacation so seamlessly that the place became known as "The Texas White House."

At this ranch, Johnson had an extensive collection of vehicles . Among them was the Amphicar, an amphibious passenger car built in the 1960s, which he used to play pranks on his visitors.

9

Richard Nixon

Image: White House Photographer, Public domain, via Wikimedia Commons

Not many people know this, but Richard Nixon was an artistic man. He enjoyed theater—he even met his future wife during a community theater audition—and he could play five musical instruments : piano, saxophone, violin, clarinet, and accordion.

But he was also into sports. In addition to being a huge football fan, he and First Lady Pat Nixon enjoyed bowling . In fact, the Nixons were responsible for moving the White House bowling alley back to the Executive Mansion after it had been relocated to a nearby building years earlier.

10

George W. Bush

Image: Series: Photographs Related to the George W. Bush Administration, 1/20/2001 - 1/20/2009Collection: Records of the White House Photo Office (George W. Bush Administration), 1/20/2001 - 1/20/2009, Public domain, via Wikimedia Commons

During his free time, George W. Bush enjoyed golfing, biking, attending baseball games, and reading American history. He was also a very competitive runner .

However, when the 43rd president of the United States left office, he was only 62 years old—plenty of time to acquire a new pastime. In the years following his time in the White House, Bush surprised many by turning to painting . "I’m a painter," he told Jay Leno on The Tonight Show .

11

Dwight D. Eisenhower

Image: ddd

To relieve the stress of leadership, Dwight D. Eisenhower maintained a number of hobbies that he cultivated throughout his life. One of his main passions was golf , which he played during and after his presidency. He even kept a small putting green in the White House garden and had a four-hole practice course installed at Camp David.

But that’s not all. Ike enjoyed fishing, hunting, shooting, watching Western movies, and playing bridge. He was also an avid painter who often captured natural landscapes and gave them as gifts to friends. After leaving the White House, Ike settled on a farm near Gettysburg, Pennsylvania, where he raised Black Angus show cows that won blue ribbons at state and county fairs.

12

John F. Kennedy

Image: Robert LeRoy Knudsen, Public domain, via Wikimedia Commons

John F. Kennedy was an exercise enthusiast and something of a jock. He played many sports : golf, tennis, swimming, baseball, and football. Despite being an athletic man, he enjoyed smoking between four and five cigars a day—his favorite brands were Upmanns and Monticellos!

But perhaps the hobby that most helped him relax from the tensions of the presidency was boating. Like many members of his family, John F. Kennedy loved to sail and was often photographed at sea with his wife and young children.