New York, NY (WIBX) - Several moments of silence will be held during today's September 11th memorial ceremony at the World Trade Center site.

8:46 a.m. to mark the time when the first plane hit the North Tower

9:03 a.m. to mark the second plane hitting the South Tower  

9:37 a.m. for the plane that crashed into the Pentagon

9:59 a.m. when the South Tower fell

10:03 a.m. for Flight 93's crash in Shanksville, Pennsylvania

10:28 a.m. for the collapse of the North Tower