Quick summary: On September 11, 2001, terrorists hijacked four commercial airplanes and carried out coordinated attacks on the United States, striking the World Trade Center in New York City and the Pentagon in Arlington, Virginia, while a fourth plane crashed in a field near Shanksville, Pennsylvania, after passengers fought back. Nearly 3,000 people were killed that day, and thousands of first responders, survivors, and recovery workers have since died or suffered from related illnesses. Twenty-five years later, the phrase “Never Forget” remains a national commitment to honor the victims, the heroes, and the resilience that followed.
What Happened on September 11, 2001
At 8:46 a.m., American Airlines Flight 11 struck the North Tower of the World Trade Center. Seventeen minutes later, United Airlines Flight 175 hit the South Tower. Both 110-story towers collapsed within two hours, along with several surrounding buildings in Lower Manhattan.
At 9:37 a.m., American Airlines Flight 77 crashed into the Pentagon, killing 184 people. A fourth plane, United Airlines Flight 93, was believed to be headed toward Washington, D.C. — likely the U.S. Capitol or the White House — before passengers and crew members stormed the cockpit. The plane crashed in a field near Shanksville, Pennsylvania, at 10:03 a.m., killing all 40 passengers and crew but sparing untold lives on the ground.
In total, 2,977 people were killed in the attacks, not counting the 19 hijackers, making it the deadliest terrorist attack in world history and the single deadliest incident for firefighters and law enforcement officers in U.S. history.
The Heroes of September 11
The events of that morning produced extraordinary acts of courage:
- 343 members of the Fire Department of New York (FDNY) died while rushing into the burning towers to rescue others.
- 23 New York City Police Department officers and 37 Port Authority police officers lost their lives.
- The passengers and crew of Flight 93 organized a counterattack against the hijackers, almost certainly preventing an attack on a major government building.
- Civilian first responders and bystanders guided coworkers and strangers to safety through smoke-filled stairwells.
- Volunteers from across the country, including ironworkers, medical teams, and chaplains, arrived at Ground Zero, the Pentagon, and Shanksville in the days that followed to search for survivors and support recovery efforts.
In the years since, thousands more responders and survivors have died from cancers and respiratory illnesses linked to toxic dust exposure at Ground Zero — a reminder that the cost of that day did not end in 2001.
Why We Say “Never Forget”
“Never Forget” is more than a slogan. It reflects a collective promise to:
- Honor the victims — the office workers, first responders, airline passengers, and crew members who lost their lives.
- Remember the heroes — those who ran toward danger instead of away from it.
- Preserve the history — so future generations understand what happened and why it matters.
- Support the survivors — including responders still battling 9/11-related illnesses through programs like the World Trade Center Health Program.
- Reaffirm unity — recalling how communities, and the country as a whole, came together in the aftermath.
How People Observe September 11 Today
Each year on September 11, Americans mark the anniversary through:
- Moments of silence at 8:46 a.m., 9:03 a.m., 9:37 a.m., and 10:03 a.m. — the times of the plane crashes and tower collapses.
- The National September 11 Memorial & Museum in New York, where the names of all victims are read aloud at the annual commemoration ceremony.
- Tribute in Light, twin beams of light projected into the New York sky each evening of September 11, representing the fallen towers.
- 9/11 Day of Service, encouraging Americans to volunteer in their communities as a tribute to those lost.
- Flags at half-staff across the country, and ceremonies at the Pentagon Memorial and the Flight 93 National Memorial in Shanksville.
Frequently Asked Questions
How many people died on 9/11? 2,977 people were killed in the attacks, along with the 19 hijackers. This includes victims at the World Trade Center, the Pentagon, and aboard the four hijacked flights.
How many first responders died on 9/11? 343 FDNY firefighters, 23 NYPD officers, and 37 Port Authority police officers died on the day of the attacks. Thousands more responders have since died from related illnesses.
Why did Flight 93 crash in Pennsylvania? Passengers and crew, having learned of the other attacks through phone calls, fought to retake control of the aircraft from the hijackers. The plane crashed in a field near Shanksville rather than reaching its intended target in Washington, D.C.
What does “Never Forget” mean in the context of 9/11? It is a widely used phrase expressing a commitment to remember the victims, honor the heroism shown that day, and ensure the events of September 11, 2001, are not forgotten by future generations.
A Promise That Endures
Twenty-five years on, the skyline of Lower Manhattan has changed, new buildings have risen, and generations too young to remember that morning have grown up hearing about it secondhand. But the promise embedded in “Never Forget” doesn’t fade with time — it’s renewed every year, in every moment of silence, every name read aloud, and every act of service carried out in memory of those lost.
We honor the victims by remembering their names. We honor the heroes by living up to the courage they showed. And we honor the day itself by making sure it is never reduced to just a date on a calendar, but remembered as a moment that revealed both the depths of tragedy and the heights of human bravery.
Never forget.
