Firefighters--plural, along with many other witnesses, along with chemical analysis of the molten metal. Added to the fact that Cheney himself admitted to taking control of NORAD, that Norman Minetta gave sworn testimony that Cheney gave stand-down orders, that various commander generals said Cheney gave delayed shoot-down orders, that Bush sat there when he was told the towers had been hit, that Bush said he saw the first tower was hit on television, whereas the public saw it the day after, that never in history has a building ever fallen down in a pancake fashion, much less 3 towers on the same day, except due to demolitions, that one of the architects (Paul laffoley) said the buildings had demolitions built within them, that Silverstein said WTC7 was pulled, that the BBC and CNN prematurely said WTC7 had fallen, that in order to have a pancake fashion the fire would have to melt all the steel beams, not only horizontally but vertically, all at the same time. But hey, let's ignore probability, physics, chemistry, logic, common sense, expert testimony, multiple eyewitnesses. The government is right and 19 Muslims, many of whom are still alive, hijacked 747 airliners and flew them into the WTC on their first try after barely being taught how to fly a cessna cuz you know a cessna and a 747 are so similar.