I'm not the only one

[DiggityBiggity]

http://villagevoice.com/news/0549,murphy,70685,6.html

Your concerned leader

Diggity"Go at it boys"Biggity

[crzyone]

I made a decision that the building was no longer safe and that was based on the conditions in the lobby—large pieces of plaster falling, all the 20-foot-high glass panels on the exterior of the lobby were breaking, there was obvious movement of the building, and that was the reason on the handy talky I gave the order for all fire department units to leave the north tower. Approximately ten minutes after that we had collapse of the south tower." Fire chiefs also received—just moments before the south tower fell—a report that someone from the city's Office of Emergency Management thought the towers weren't structurally sound. The source of that report is unknown.

Sounds to me like the building was giving signs that it was suffering metal fatigue from the heat of the fires. Doesn't seem like they were brought down with explosives.