such as the shoe bomber and many attempts to blow up airplanes. so it's not a new thing. do not underestimate these people. they're capable of hitting us any way they want. >> there's been a lot of security. and the united states, we like to believe -- we like to believe -- that we have a better system. that our tsa agents have a screening process in place that when they make us wipe down our hands and so on, they're testing for bomb residue, that that's going to stop a bomb from getting on board a u.s. aircraft. >> do you believe it could happen here?