Remembering 9/11: Wind chimes for the silenced
In Shanksville, Pa., at the site of the crash of Flight 93 on September 11, 2001, wind chimes now remember the 40 passengers and crew who brought down the plane hijacked by terrorists and directed towards Washington, D.C. Chip Reid reports on the unveiling of the "Tower of Voices" at the Flight 93 National Memorial.