41.   While on the phone, he saw the second plane heading for the second tower.

42.   A second tower in the northeast was virtually surrounded.

43.   Her husband worked in the second tower but he was evacuated and uninjured.

44.   Jules Naudet is rushing with his camera toward escalators when the second tower collapses.

45.   He gives the order to evacuate the second tower.

46.   A second moment ofen plane ignited a fireball in the second tower.

47.   For those who chose to head down, the only usable staircase in the second tower seemed engulfed in flames and smoke.

48.   Lineman Joe Andruzzi had three brothers, all firefighters, called to the scene and his brother Jim barely escaped the second collapsing tower.

49.   Reinforcements arrive, and the men prepare to climb the tower when another explosion flashes -- a plane has just crashed into the second tower.