World Trade Center attacks on September 11, 2001 in New York.

A fireman holds his face in his hands in the debris of the World Trade Center in New York, 12 September, 2001. Rescue workers are attempting to find survivors of the World Trade Center buildings which collapsed after hijacked airplanes collided with each of the towers. AFP PHOTO/Marcos TOWNSEND

World Trade Center Attacks - Fireman and rescue workers go through rubble & wreckage looking for survivors. September 13, 2001.

World Trade Center Attacks - Fireman and rescue workers go through rubble & wreckage looking for survivors, September 13, 2001.

World Trade Center Attacks - Fireman and rescue workers go through rubble & wreckage looking for survivors, September 13, 2001.