If the Pentagon really was attacked by Flight 77, then why doesn the government release more evidence to prove it?
Those benefiting from the programs predicated on the official story of 9/11 (such as the ‘War on Terror’) are served by misinformation that muddles the case for official complicity in the crimes of 9/11/01. It is possible that the Pentagon attack was engineered with the aim of creating a distracting debate that continues for years without resolution. See the essay The Pentagon No-757-Crash Theory: Booby Trap for 9/11 Skeptics.