President George W. Bush learned of the 9/11 attacks while visiting a classroom.

President Bush addressed the nation on 9/11 from the Oval Office, watched by an estimated 80 million people.

President Bush threw the first pitch at the World Series in New York City less than two months after 9/11.

Vladimir Putin was the first world leader to call Bush after 9/11, and visited the US two months later.

Experience 9/11, the deadliest terrorist attack on American soil, as it happened.

9/11 reshaped US foreign and military policy for decades, shifting focus to non-state actors and the Middle East.

George W. Bush delivered the first State of the Union livestreamed online

In 2002, George W. Bush became the first president to livestream the State of the Union, using the address to label Iraq, Iran, and North Korea an "axis of evil," shaping US strategy during the War on Terror.

9/11 was the first global disaster watched in real time across the world

As the first plane struck at 8:46 a.m. ET, CNN's live feed broadcast images worldwide within minutes. An estimated 2 billion people watched the collapse of the Twin Towers live.

One hijacked plane struck the Pentagon on 9/11, killing 125 people inside

American Airlines Flight 77 crashed into the Pentagon's west side, destroying a section of the building and killing all 59 on board, along with 125 military and civilian personnel, making it the deadliest attack on the US military headquarters.

There is a secretive bomb-proof bunker located under the White House

Built in 1942 during World War II, the Presidential Emergency Operations Center lies beneath the East Wing. Designed to protect the president during air raids—and later nuclear threats—it remains a top-secret command site used during crises like 9/11.

Coverage of the 9/11 terrorist attacks helped shape Wikipedia's editorial policies

Launched nine months earlier, the site was featured on Yahoo's news page, attracting traffic from information seekers as dozens of new editors created hundreds of articles, including memorials, conspiracy theories, and donation and volunteer pages. Discussions between editors would begin establishing rules for handling breaking news events.

One Day in America series reveals the full timeline and human toll of 9/11

This National Geographic episode reconstructs the events of 9/11—highlighting the Pentagon attack, Flight 93 hijacking, South Tower collapse, and rescue efforts—offering a detailed, chronological account of how the day unfolded.

The US launched the Global War on Terror after 9/11

In the wake of 9/11, the US declared a Global War on Terror—initiating military operations in Afghanistan and Iraq, expanding surveillance, and forming international coalitions to combat terrorism and disrupt extremist networks worldwide.

View artifacts at the Smithsonian that tell the story of 9/11.

AP Photos: 20 images documenting the enormity of 9/11

The Associated Press shares 20 photographers’ frames from Sept. 11, 2001, when hijackers crashed commercial planes into New York’s World Trade Center, the Pentagon and a Pennsylvania field.

US intelligence warned in multiple reports of al-Qaida's plans to strike before 9/11.

See how newspapers broke the news of the attack around the world

This collection showcases front pages from cities around the globe reacting to Pearl Harbor in real-time—capturing the shock, fear and uncertainty as the US entered World War II.

See intact objects found in the wreckage of Flight 93, which crashed in Pennsylvania after its 40 passengers and crew stormed the cockpit, stopping the hijackers from reaching their likely target, the US Capitol Building.

The 9/11 plane crashes, which resulted in the collapse of the Twin Towers, created toxic dust that included materials including asbestos, silica, metals, concrete, and glass.

Flight 93 passengers fought back and prevented a fourth target

United Airlines Flight 93 was hijacked en route to Washington, DC. Passengers learned of the other attacks and stormed the cockpit. The plane crashed in Pennsylvania, likely preventing a strike on the US Capitol.

After the 9/11 terrorist attacks, US radio stations created a list of 150 banned songs they feared would be insensitive.

About 2.5 million American students watched the Challenger disaster live

Because of the publicity of the Teacher in Space program, millions of students viewed Challenger's liftoff in school classrooms—turning the explosion into a shared national traumatic experience marked by shock, silence, and grief.

The children of parents who died on 9/11 share their stories in remembrance

Many children of 9/11 victims were too young to remember their parents who died. They’ve grown up living with the tension between having a personal connection to the day but few, if any memories. Read some of their stories.

How NATO responded to 9/11

The collective defense clause of the NATO constitution has only been invoked one time: after the 9/11 terrorist attacks against the United States. This video explores the immediate actions NATO took to respond to the attacks to support the United States. These firsthand clips from 2001 give a sense of the magnitude of the moment and the difficult decisions facing NATO leaders at the time.

Watch Springsteen open a somber 9/11 tribute

“America: A Tribute to Heroes” was a fundraising telethon on Sept. 21, 2001, and simulcast across the four major networks. Springsteen opened the program with “My City of Ruins,” a song originally written about Asbury Park that took on new significance after the Sept. 11 terrorist attacks.

Americans showed an unprecedented surge of patriotism after 9/11

In the weeks following 9/11, 79% of US adults reported displaying the American flag, and a year later, 62% said they "often felt patriotic" due to the attacks.

What 9/11 did to one family: the heartbreaking story of Bobby McIlvaine

Grief, conspiracy theories, and a family's search for meaning in the two decades since the attacks. On Sept. 11, 2001, Bobby McIlvaine was killed, along with nearly 3,000 other Americans. In the years since, his parents and brother have searched for...

The White House was burned by British forces during the War of 1812

On August 24, 1814, British troops invaded Washington, DC, and set fire to the President's House, destroying its interior and roof. However, the exterior sandstone walls survived. After the war, reconstruction began under the original architect.

The White House Situation Room was created in 1961

In 1961, John F. Kennedy approved the establishment of the White House Situation Room—a secure crisis-management center in the West Wing basement—following the intelligence failures of the Bay of Pigs invasion and the growing tensions of the Cold War.

A NYC church near ground zero became a 24/7 relief center for more than eight months without closing after the attacks, providing meals, beds, and other support to relief workers.

The US and allies invaded Iraq based on flawed intelligence about potential weapons of mass destruction.

FDR stayed composed as he absorbed the news of Pearl Harbor

This video reconstructs Roosevelt’s steady, methodical response on Dec. 7, 1941, from his first briefing to drafting his speech to Congress. It demonstrates how FDR maintained composure and moved rapidly to prepare the nation for war.

Broadway theaters reopened 48 hours after the 9/11 terrorist attacks at the request of New York Mayor Rudy Giuliani.

343 members of the Fire Department of New York died on 9/11 trying to rescue people from the World Trade Center.

9/11 permanently changed air travel security in the US with the creation of the Transportation Security Administration.

The White House's modern East Wing—demolished in 2025—was built above a secure underground bunker

Completed in 1942, the East Wing provided offices and a public entrance but primarily disguised the construction of the Presidential Emergency Operations Center beneath it—a secure command bunker built during World War II after the attack on Pearl Harbor.

President Reagan postponed the State of the Union after Challenger

In his Oval Office address delivered the night of the disaster, President Ronald Reagan spoke directly to the nation about the loss of Challenger and its crew, postponing that evening's scheduled State of the Union to address the tragedy.

Watch Jon Stewart's unifying opening monologue during his first show back after the 9/11 terrorist attacks.

An in-depth account of the image of 'The Falling Man' whose final seconds capture the visceral horrors of 9/11

Do you remember the photograph above? In the US, people have taken pains to banish it from the record of Sept. 11, 2001. Here's a detailed account of the story behind it, the search for the man pictured in it, and its impact on those who lived through the tragic day.

Before the White House was constructed, the president lived and worked in Philadelphia

From 1790 to 1800, the President's House at 6th and Market Street in Philadelphia served as the executive mansion. George Washington and John Adams both served there as president before the capital moved to Washington, DC. The site is a tour of a replica of the house.

The toxic dust from 9/11 sites still claims lives decades later

In the years after 9/11, nearly 17,000 first responders enrolled in health programs have reported cancers and respiratory diseases linked to Ground Zero exposure. More have died from related illnesses than were killed on the day itself.

They lost loved ones on 9/11. Hear the heart-wrenching voicemails they'd leave for them.

NPR set up an old phone booth in Brooklyn Bridge Park — across the river from the new World Trade Center — and invited people to leave a voicemail for someone they lost that day.

Welcome to Gander, a tiny town of around 10,000 people in Newfoundland, which took in nearly 7,000 passengers for days after the 9/11 attacks grounded all air travel in the US.

A firsthand account from the AP photographer who captured 'The Falling Man'

On 9/11, AP photographer Richard Drew made one of the most indelible — and harrowing — images of the 21st century. Here's his account of the photo he captured.

Children of 9/11 Ground Zero responders are suffering from intergenerational trauma similar to what's seen among the children of Holocaust survivors, according to recent research.

Explore personal 9/11 oral histories from survivors, first responders, and families

The 9/11 Memorial Museum's archive includes over 3,500 firsthand interviews—spanning survivors, first responders, family members, and residents—offering rare, deeply personal perspectives on the tragedy and its aftermath.

The PATRIOT Act expanded government surveillance after 9/11

Signed into law weeks after the attacks, the PATRIOT Act granted federal agencies sweeping powers to monitor communications, access records, and conduct surveillance—sparking ongoing debates over privacy, civil liberties, and national security.

At 3 pm on Memorial Day, Americans are asked to pause for one minute of silence

President Bill Clinton first called for the National Moment of Remembrance in 1999, and Congress made it law in 2000. The time was chosen because most Americans are in the middle of holiday activities.

9/11 first responders still deal with significant mental and physical impairments.

Presidents invite guests to personalize the State of the Union

The tradition began in 1982 when Ronald Reagan honored Lenny Skutnik, who rescued a survivor from the icy Potomac after a plane crash. Since then, presidents have spotlighted a wide range of guests from Rosa Parks to Rush Limbaugh to humanize and reinforce policy themes.

Watch an American news report of the Chernobyl disaster

Americans first heard about the Chernobyl nuclear disaster two days after the event, once abnormal radiation was detected in nearby countries. This forced Soviet officials to acknowledge the catastrophe publicly for the first time a few days after it occurred.