Ceremonies will be held in New York City, Virginia and Pennsylvania.
NEW YORK -- Friday marks 25 years since the Sept. 11, 2001, terror attacks, which claimed the lives of 2,977 people at the World Trade Center, the Pentagon and in Shanksville, Pennsylvania.
Another 9,000 people have died from 9/11-related illnesses over the last 25 years.
Victims' families, first responders and politicians will gather on Friday for annual remembrance ceremonies as Americans across the country pause to remember and reflect.
"9/11 Tribute in Light: Live from Lower Manhattan," a one-hour ABC News multiplatform live special, premieres on Friday, Sept. 11, at 8 p.m. EDT on this ABC station, Disney+, Hulu, National Geographic and ABC News Live.
Prior to the start of the lower Manhattan ceremony, New York City Mayor Zohran Mamdani shook hands with former New York City Mayor Rudy Giuliani, who had publicly called on the city's first Muslim mayor not to attend.
The second moment of silence was held at 9:03 a.m., marking the moment United Airlines Flight 175 crashed into the World Trade Center's North Tower.
The annual reading of the victims' names is now underway at the ceremony at New York City's 9/11 Memorial & Museum.
At 8:46 a.m., the first moment of silence was held at the ceremony at the 9/11 Memorial & Museum ceremony. This marks the time American Airlines Flight 11 crashed into the World Trade Center's North Tower.
