Scientific Study: ‘Towers Collapsed Due To Controlled Demolition’ What can I say, the idea that two planes caused three buildings to collapse due to fire has always seemed absurd to me. (Two of those buildings being the twin towers and the third being building 7 which just caught fire due to falling debris, presumably.) And then fell down. Uh huh. The first time in history a high rise has collapsed due to fire. Well, the first three times in history. Doesn't seem too likely to me. Multiple reports on the ground of huge explosions at the base of the towers after the planes hit from credible eyewitnesses. And just the common sense that enormous steel buildings don't sit on fire for an hour or two and then crumble into dust. Fifteenth anniversary right around the corner.