Today, the Chair of the Department of Civil and Environmental Engineering at the University of Alaska, Fairbanks, a PhD in structural engineering and one of the nation's top experts in the cause of building collapses (Leroy Hulsey) publicly announced that - contrary to the government’s explanation - fire did NOT bring down World Trade Center building 7 on 9/11:   

He joins scores of other structural engineers, civil engineers, high-rise architects, and fire experts who say that the government's story is false ... Building 7 was NOT brought down by fire.

And see this.