9/11-WTC7 Larry Silverstein if one building was rigged for demolitions the rest were too. Takes mon

If one building was rigged for demolitions like building seven,then the rest were rigged for demolitions . It takes months for building these surveys to be rigged for demolitions

On September 11th 2001 there were 'terrorist attacks in NYC and in Washington D.C.
One 'plane' hit the Pentagon and two other ones hit WTC1 & 2...so why did WTC7 collapse in 6 SECONDS at 5:20pm on that very day? (supposedly due to fires(!!!))