Photo Gallery: Osama Bin Laden and 9/11
09/09/2011
Two passenger planes piloted by al-Qaida terrorists slammed into the twin...
DPA / ABC / New York Police

Two passenger planes piloted by al-Qaida terrorists slammed into the twin towers of the World Trade Center as two more hijacked planes head toward Washington, D.C. Nearly 3,000 people died in the attacks.