The problem with airport security in America is that they search for "Dangerous Items", not "Dangerous People". A dangerous person is allowed on an American flight if he/she doesn't have any dangerous items with him. In my opinion, a motivated group of guys could take a plane hostage with nothing but car keys, ju jitsu and some creative thinking. I'm not saying searching for the dangerous person is superior to search…
It's like having a bank, where the front door is policed by an army, but the backdoor is wide open for employees, and every window in the place is open every day.
Given the amount of theft from airport bags, and hence stolen goods _leaving_ the airport, do you think it's any harder to bring illicit stuff in?