Video: 'Building weakened by WTC attack collapses'

(Tuesday, September 11, 2001, 5:20:33 p.m. EDT; during the September 11 attacks, part of terrorism in the United States and the War on Terror) — 7 World Trade Center, also known as the Salomon Bros. Building, a 47-story building that had sustained damage from falling debris and widespread fires, collapsed this afternoon.

Video: '(2) CNN 9-11-2001 Live Coverage 5.00 P.M E.T -12:00 A.M E.T'

Due to the emergency personnel having more than enough time to evacuate the building since the 10:28 a.m. collapse of the World Trade Center North Tower, there were no injuries or deaths.

Video: '9/11: As Events Unfold'

The collapses were all the result of a series of four coordinated suicide attacks by al-Qaeda on the United States, collectively known as the September 11 attacks.