‘America Stands Tall': Obama at Pentagon's 9/11 Ceremony

The nation is pausing to remember the lives lost 13 years ago in the September 11 attacks. The commemorations got underway in the D.C. area at dawn with the unfurling of an American flag down the side of the Pentagon. The tradition began Sept. 12, 2001, when firefighters unexpectedly got onto the building’s roof and draped a large flag across the damaged building — a quiet symbol of America’s determination.