STUPID THEORY 2: The twin towers did not collapse. They were demolished.
SIMPLE REBUTTAL: 9/11 "truthers", who would perhaps be more accurately described as 9/11 "liars", like to rope in an expert to tell you that no office fire ever made a building topple. Well, that'd be because no office fire was ever as big as these two, with as much jet fuel to help it along.
But the real reason the twin towers collapsed was structural. Most buildings have their core structural supports at the centre. The towers had some major central steel columns, but that elegant exterior steel shell was also crucial in providing perimeter support. Also, the perimeter columns supported massive steel trusses which supported each floor.
So basically, when the exterior of the building was penetrated so devastatingly
by the planes, the structure's ability to hold itself up was threatened. So when one floor went, the combined weight meant they all went.
Read more:
Six really stupid 9/11 conspiracies debunked in about six seconds | News.com.au
BUILDING 7, duh.
