I found the following tidbit in the News of the Weird:
KUSA-TV reported in March that a Transportation Security Administration undercover team was able to sneak simulated liquid explosives past screeners at Denver International Airport about 90 percent of the time during a three-day test in February, in nearly every case because, though machines detected the explosives, the undercover agents talked the screeners out of personally searching them. [KUSA-TV (Denver), 3-29-07]
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If ye love wealth better than liberty, the tranquility of servitude than the animated contest of freedom, go from us in peace. May your chains sit lightly upon you, and may posterity forget that you were our countrymen! - Samuel Adams