Originally Posted by
cestmoi123
As noted elsewhere, it's a function of the size of the plane (also range and speed), and how much damage you could really do with it. A hijacked 30 seater prop presents much less risk to the general public than a hijacked 767that's fully fueled, which weighs 14x as much, and flies 2x as fast.
Which came first: some sort of regulatory exemption from fixed terminal security screening checkpoints (and related screening) for very small commercial flights, or 9/11 and the TSA later in 2011?