6 moments of silence to remember 9/11 on 20th anniversary

NEW YORK --- On the 20th anniversary of the Sept. 11 terror attacks, six moments of silence are part of the memorial ceremony. The public is invited to observe any or all of them. Here is the list: 8:46 a.m. ET: Hijackers crash Flight 11 into the north tower. 9:03 a.m.: Hijackers crash United Airlines [...]