DAY OF DESTRUCTION — Pedestrians flee the area around the World Trade Center as the south tower collapses following the terrorist attack on the New York landmark on Tuesday, Sept. 11, 2001. The attacks that day were carried out by 19 al-Qaeda terrorists and killed nearly 3,000 people.

RETURN TO NORMALCY — This is how the same part of lower Manhattan pictured above looked last month. The Lower Manhattan Development Corporation was established in 2001 to serve as the official commission overseeing the rebuilding process.<BR></BR><BR></BR><BR></BR><BR></BR><BR></BR><BR></BR>

ATTACK ON THE PENTAGON — This is how the Pentagon looked on the day after the attacks. The dome of the Capitol is seen in the background. Five hijackers flew American Airlines Flight 77 into the building at 9:37 a.m. on Sept. 11, 2001. There were 125 victims at the Pentagon.<BR></BR><BR></BR><BR></BR><BR></BR>