Just thinking what's to stop the hijackers from boarding gas masks as a precautionary measure. I guess that would be up to the security check-in folks to ensure that those were not carried on. In any case, all of these security measures being proposed to the airplane will require lots of time to implement.

I think it is really going to be essential that the entire security apparatus works together to minimize risk at every step along the way. A lot of pundits keep saying that security will become lax again in a few months or whenever the American public gets tired of the inconveniences. I have greater faith that the memory of planes crashing into the WTC and the Pentagon will keep viligance high. I hope I am not being overly optimistic.