[LarryM]

I wouldn't believe a word the FBI says. It appears that the terrorist was part of a sleeper cell associated with the Egyptian Jihad organization. Perhaps the FBI doesn't want people to know about the prevalence of terrorist sleepers. After all, isn't the FBI responsible for internal security?

[dirtboy]

One other possible theory. If the guy was a terrorist, he was stopped VERY quickly by an armed individual. Can't have the horrific precedent set (horrific, at least, to the feds) that armed individuals are a highly effective deterrent to terror...

[Willie Green]

Now why would our F.B.I. cover up the terrorist attack at LAX?

Simple, routine matter of trying to keep investigative information confidential in hopes of nabbing any accomplices.
However, it does seem rather absurd for them to deny what is, on the surface, evident to everybody else in the world.
Nevertheless, I have no problems cutting them some slack while they are obviously still accumulating, analyzing and evaluating evidence.