Twenty-five years have passed since a clear September morning became one of the darkest days in American history.
On Sept. 11, 2001, 19 al-Qaida terrorists hijacked four commercial airplanes, setting in motion attacks that killed 2,977 people in New York City, at the Pentagon and near Shanksville, Pennsylvania. Thousands more were injured, and the consequences of the attacks would reshape American life for decades.
On Friday, Sept. 11, 2026, the country marked the 25th anniversary with ceremonies, moments of silence and the reading of victims’ names. Families returned to the places where their loved ones died. First responders remembered colleagues who never came home. A generation that lived through the attacks looked back, while millions of younger Americans confronted an event they know only through history books, photographs and the stories of others.
A quarter century has changed the skyline of New York and the country itself. But at the three sites attacked that morning, the anniversary remained centered on the people whose lives were lost.
Remembering the Morning That Changed America
The attacks began at 8:46 a.m. Eastern time when American Airlines Flight 11 crashed into the North Tower of the World Trade Center.
United Airlines Flight 175 struck the South Tower at 9:03 a.m.
At 9:37 a.m., American Airlines Flight 77 crashed into the Pentagon in Arlington, Virginia.
The fourth hijacked aircraft, United Airlines Flight 93, never reached its suspected target in Washington. After passengers and crew members learned what had happened elsewhere, they fought back against the hijackers. The aircraft crashed in a field near Shanksville, Pennsylvania, at 10:03 a.m., killing everyone aboard.
In New York, the South Tower collapsed at 9:59 a.m. The North Tower followed at 10:28 a.m.
By the end of the morning, the Twin Towers that had defined the Manhattan skyline were gone. Lower Manhattan was buried in debris and dust. Part of the Pentagon was burning. A field in rural Pennsylvania had become the final resting place for 40 passengers and crew members.
The dead included office workers, airline passengers and crews, military and civilian personnel, police officers, firefighters, emergency medical workers and people from around the world.
The New York City Fire Department lost 343 members on Sept. 11, the largest loss of firefighters in a single incident in U.S. history.
The toll did not end that day. Hundreds of FDNY members have since died from illnesses connected to exposure at the World Trade Center site, while thousands of survivors, responders and others exposed to the aftermath continue to live with 9/11-related health problems.
A Quarter Century Later at Ground Zero
At the National September 11 Memorial in Lower Manhattan, relatives again gathered Friday to read aloud the names of those killed in the 2001 attacks and the 1993 World Trade Center bombing.
The ceremony included the familiar moments of silence corresponding to the attacks and the collapses of the towers. This year, organizers added another moment of silence to recognize those who have died from 9/11-related illnesses and injuries in the years since the attacks.
The anniversary also brought together national leaders from different political eras. Vice President JD Vance attended the New York ceremony along with former presidents Bill Clinton, George W. Bush, Barack Obama and Joe Biden.
But, as it has been for a quarter century, the focus of the ceremony was not supposed to be politics.
It was the names.
Year after year, relatives have stepped to the microphone to identify husbands and wives, mothers and fathers, sons and daughters, brothers and sisters, friends and colleagues. Twenty-five years later, those readings carry an additional reminder of time passing. Children who lost parents are now adults. Parents who lost children have grown old. Some family members who attended the earliest anniversaries have themselves died.
Yet the names continue to be read.
The National September 11 Memorial & Museum says roughly 100 million Americans are now too young to personally remember the attacks, making education an increasingly important part of preserving the history of the day.
For those Americans, Sept. 11 is history rather than memory.
Remembering the Pentagon
President Donald Trump and first lady Melania Trump attended Friday's observance at the Pentagon, where 184 people were killed when Flight 77 struck the building.
The names of those victims were read as a bell sounded in remembrance. Earlier Friday, a large American flag was unfurled on the side of the Pentagon at the location struck by the hijacked aircraft, echoing one of the enduring images from the days after the attack.
The anniversary comes as plans move forward for a long-awaited visitor education center at the Pentagon 9/11 Memorial. A symbolic groundbreaking is scheduled for Saturday for the proposed $100 million facility, which supporters hope will open in 2029. The Pentagon remains the only one of the three Sept. 11 attack sites without a dedicated museum or visitor center explaining what happened there.
Honoring the Heroes of Flight 93
In Pennsylvania, the Flight 93 National Memorial held its 25th annual observance near the Wall of Names.
The morning ceremony included the reading of the names of the 40 passengers and crew members aboard Flight 93 and the ringing of the Bells of Remembrance. Additional events were scheduled throughout the day as part of several days of programming surrounding the anniversary.
The story of Flight 93 has become one of the defining accounts of courage from Sept. 11.
Passengers and crew members, realizing that their hijacked aircraft was part of a coordinated attack, made the decision to confront the hijackers. Their actions prevented the plane from reaching its intended destination and turned an ordinary field in Pennsylvania into a place of national remembrance.
Twenty-five years later, the National Park Service says the responsibility increasingly falls to a new generation to carry forward the stories of those passengers and crew members.
The America That Emerged After 9/11
The significance of the 25th anniversary extends beyond remembering what happened during those few terrible hours.
Sept. 11 changed the United States.
Airport security was transformed. Congress created the Department of Homeland Security. Intelligence agencies underwent major changes. The United States launched a global campaign against terrorism and entered wars in Afghanistan and Iraq. American troops would spend two decades fighting in Afghanistan before the final U.S. withdrawal in 2021.
The attacks also changed everyday American life in ways that became so routine that younger generations may not recognize them as part of the 9/11 legacy.
Security barriers appeared around government buildings. Airport checkpoints became more extensive. Surveillance and intelligence programs expanded. Terrorism became a central concern in American foreign and domestic policy.
The national unity that immediately followed Sept. 11 also proved difficult to sustain.
Yet images from those first hours and days continue to tell another part of the story: firefighters climbing stairwells while thousands escaped downward, strangers helping strangers through smoke and debris, volunteers arriving from across the country and Americans lining streets with flags.
That combination of loss, courage, fear, sacrifice and unity remains part of the complicated legacy of Sept. 11.
The Meaning of “Never Forget” After 25 Years
For Americans old enough to remember Sept. 11, the anniversary can bring back remarkably specific memories — where they were when they heard the news, who told them, what television images they saw and the uncertainty that followed.
For younger Americans, there is no such memory.
Someone born on Sept. 12, 2001, turns 25 this year having never experienced the America that existed before the attacks.
That generational shift may be one of the most important aspects of this anniversary.
“Never forget” can no longer depend entirely on personal memory. Increasingly, it depends on families telling stories, teachers explaining the history, museums preserving artifacts and communities continuing traditions of remembrance and service.
The physical scars of Sept. 11 have changed dramatically. One World Trade Center now rises above Lower Manhattan. Memorial pools occupy the footprints of the Twin Towers. A memorial stands outside the rebuilt Pentagon. In Pennsylvania, the field where Flight 93 crashed has become a national memorial visited by people who were not alive when the passengers and crew made their final stand.
But the human loss remains permanent.
Twenty-five years after the attacks, nearly 3,000 empty places remain at the center of the story — people who left for work, boarded airplanes, reported for duty or answered an emergency call on an ordinary Tuesday morning and never returned home.
That is why, after a quarter century, America still stops on Sept. 11.
