One more thing to ponder for all those nut jobs out there. This might be a good time to apply the principle of Occam’s Razor, which is roughly that “All things being equal, the simplest solution tends to be the best one.”
Case 1 – In a chaotic situation following a terrorist attack someone told someone else that they are evacuating a building in case it collapses, that person told someone else that they had to evacuate because the building had collapsed and that person told a reporter that the building had collapsed, in a classic conversation-chain.
OR
Case 2 – The US government orchestrates a phantom terrorist attack on the WTC buildings. A smaller nearby building is the target of a fourth aircraft that is accidentally taken down in Pennsylvania (possibly by a branch of the military that didn’t get the conspiracy memo). To make the thing seem more real, they use actual jet aircrafts on the WTC buildings and some other small projectile at the Pentagon, but claim that it too is a jet. Each of the WTC buildings involved were equipped with explosive devices to enable them to be imploded on cue, since they would no collapse on their own under the faked attack. A secret part of the government plans to release information to the BBC at exactly 4:57pm to let them announce that WTC7 has collapsed. They do this just in case nobody notices that the building falls down when they implode it. The government employee in charge of this release accidentally gives the information to the BBC before the building is actually imploded.