as was the case with the two planes that hit the WTC's and that went down in pennsylvania, were there ever any family members/friends who came forward to talk about their missing relatives that went down in the pentagon plane? i can't recall. if there really WAS a plane full of people, but a missile was sent into the pentagon, then what the hell became of the passengers? i'm not doubting the theory, i'm just really curious. where did they come up with the idea of sending in a missile and blaming it on a phantom plane? and if that's the case, why aren't more people asking the same questions?

20 Smoking Guns: The 9/11 Military/Psyops Attack

20) When September 11th prior knowledge broke in the mainstream media, around May 2002, most of it focused on the use of planes as bombs and whether or not intelligence agencies had considered this method of attack.
Although the coverage was a whitewash in itself, it can easily be proven that authorities knew terrorists were likely to use airliners as bombs. Once this is known, those that gave press conferences denying the jetliners as bombs foreknowledge, such as Condoleeza Rice, George Tenet and George Bush, can be exposed as outright liars.

In October 2000, the Pentagon conducted a series of simulations (pictured) designed to test the response to a commercial airliner crashing into their headquarters, as took place on September 11th.

The CIA, on the very morning of September 11th, was also conducting a mock exercise where a plane crashes into its headquarters.

The US was warned in 1995 of a plot to hijack commercial planes and slam them into the Pentagon and the World Trade Center. The plan was named Project Bojinka and was uncovered by Phillipine authorities. It originated with Ramzi Yousef (pictured), one of the masterminds of the first WTC bombing in 1993. The information was passed on to the FBI who totally ignored it.

U.S. and Italian officials were warned in July that Islamic terrorists might attempt to kill President Bush and other leaders by crashing an airliner into the Genoa summit of industrialized nations. They went so far as to mount anti-aircraft guns at the city's airport.

The Echelon spy network also gave British and German intelligence clear information that terrorists were going to hijack commercial planes and use them to attack symbols of American culture.

Sources - MDW US Military Website - Associated Press - CNN - Newsmax - LA Times - Biz Report