Norman Mineta's Testimony Before the 9/11 Commission
"Norman Mineta (US Secretary of Transportation) testifies that Dick Cheney was operationally aware of flight 77 as it approached the Pentagon. The government has consistently stated that it did not know the whereabouts of the hijacked aircraft before they crashed. In this video Norman Mineta testifies before the 9/11 Commission that he was present and personally observed VP Dick Cheney in the Presidential Emergency Operating Center tracking the exact position of flight 77 for many miles on its approach to the Pentagon. Q U E S T I O N: How could the most heavily defended building in the world have been so easily attacked? "
official site: National Commission On Terrorist Attacks Upon The United States