Not many people know that Building 7 of the World Trade Center also collapsed on 9/11, after the Twin Towers. According to the National Institute of Standards and Technology (NIST) the collapse was caused by office fires.
However, never before or after 9/11 did a steel frame building collapse due to fire, because normal building fires do not melt steel.
So the conclusion of NIST is not very likely, and probably completely wrong. So I would like to know what really happened to Building 7 on 9/11. I am no expert, but it sure looks like a controlled demolition. It sure does not look like a building being destroyed by fire.
This is a video of the collapse of Building 7: http://www.youtube.com/watch?v=bWorDrTC0Qg
PS. my apologies to anyone feeling hurt by this petition. Not intended.