What about #4? That any remaining or newly recruited terrorists in this country are just biding their time and planning something else? A plane might not be hijacked again, but other types of attacks could be in the works.

I could be wrong about this, but I can't recall any potential disaster that the TSA single-handedly averted after 9-11. However, I can think of a few where ordinary citizens on a plane took matters into their own hands - like the instance where a mentally-unstable young man tried to storm the cockpit and was tackled by fellow passengers. I just don't entrust my personal safety with an unreliable organization, I figure that it's up to me to stand up for myself since I'm the one who is going to be on the plane, not the TSA.