World Trade Center #7 falling is the smoking gun. Honestly, who here has watched it fall? If you answered yes, do you really believe a building would fall that perfectly after burning for a few hours? Silverstein stood to gain from an event like 9/11. It's not beyond the realm of possibility that he knew about what would happen. If a serious investigation, not 9/11 commission cover up, ever occurs I think Silverstein should be a person of interest for sure.