Several thousand mourners, survivors, and families gathered on Friday at the Flight 93 National Memorial in Stonycreek Township, Somerset County, Pennsylvania, to commemorate the 25th anniversary of one of the most defining moments of the September 11 terrorist attacks.

The ceremony centered on the 40 passengers and crew members aboard United Flight 93, who, after learning about the other hijacked planes striking targets in New York and Washington, D.C., courageously rushed the cockpit in an attempt to regain control of the aircraft. The hijackers crashed the plane into a empty field near Shanksville at approximately 10:03 a.m. on September 11, 2001. Investigators believe had the passengers not fought back, the flight's intended target — believed to be the U.S. Capitol or the White House — could have resulted in even greater casualties.

Morning and afternoon ceremonies were held at the memorial plaza, which features a reflective Naming Wall inscribed with the names of all 40 victims, a shattered glass observatory wall symbolizing the plane's impact, and a field of remembrance surrounding the crash site. Officials, first responders, and family members of the victims spoke about heroism, sacrifice, and the enduring importance of remembering the events of that day.

The Flight 93 attack was the fourth and final hijacking on September 11. The first three planes were deliberately flown into the World Trade Center towers in New York City and the Pentagon in Arlington, Virginia, killing nearly 3,000 people overall. Flight 93's passengers are widely credited with saving countless lives in the nation's capital through their brave resistance.

This year's anniversary carries particular weight as the United States marks a quarter-century since the attacks that fundamentally reshaped American foreign policy, homeland security, and daily life. Aviation screening, surveillance programs, and military engagements in Afghanistan and Iraq all trace their origins to that morning.

President Joe Biden and First Lady Jill Biden attended the commemoration, joining families of the victims and thousands of attendees who traveled from across the country to pay their respects.