Um so if it wasn't a 757 did the government round up and secretly kill the people who were suppose to be on those planes? Did they then make the 'real' 757 disapear? Are the airlines part of a giant plot to do whatever it is they are doing?
Do you see where I am going with this?
There is a passanger list, who were those people and where did they go?
Occam's razor doesn't have to cut too deep here.
And read
THIS while we are at it.
Faking a moon landing would be far easier than this