21.   Even after the second airplane struck, an open staircase connected the upper reaches of the south tower to the street.

22.   Fifteen minutes after the attack on the north tower, the second plane hit the south tower.

23.   Firefighters were ordered to evacuate the twin towers shortly before the collapse of the south tower, the first to fall.

24.   Grace Alegre and Ildefons Cua found romance at the south tower.

25.   He had actually evacuated to the lobby of the south tower, but a security guard told him to go back.

26.   He had safely walked to the concourse level by the time his south tower was struck by the hijacked airliner.

27.   He died in the south tower.

28.   He was last seen heading into the south tower.

29.   He was nearly buried under rubble when he went to the lobby of the south tower to set up a command post.

30.   He was on the United Airlines flight that hit the south tower of the World Trade Center.