6 Moments of Silence Held to Mark Anniversary of 9/11 Terror Attacks

Playing Moments of Silence Mark Key Events on Anniversary of Sept. 11 Attacks

Six moments of silence were held to commemorate the 17th anniversary of the Sept. 11 terror attacks. 

The first came at 8:46 a.m. to mark the moment hijackers crashed Flight 11 into the north tower of the World Trade Center.

The next came shortly after at 9:03 a.m., when the second struck the south tower. 

Another moment of silence was held at 9:37 a.m., when Flight 77 crashed into the Pentagon. 

At 9:59 a.m., the south tower of the World Trade Center collapsed. 

At 10:03 a.m., passengers on Flight 93 attempted to thwart hijackers, leading the plane to crash into a field in Shanksville, Pennsylvania

And finally, at 10:28 a.m., the north tower of the World Trade Center fell. 

Nearly 3,000 people were killed in the attacks. 

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