That's a good question. Perhaps they do it for the same reason that a police officer stands by road construction crews now. The officer has no radar gun, yet

That's a good question. Perhaps they do it for the same reason that a police officer stands by road construction crews now. The officer has no radar gun, yet everybody slows down and behaves when they are there. If someone were really motivated they could cause havoc at the work site even though the officer was there. But maybe this just keeps the not so intelligent and motivated from getting involved. I mean, why would someone try to smuggle a knife aboard in his shoe? http://www.tsa.gov/press/goodcatch/050511_artfully_concealed_in_shoes.shtm http://www.tsa.gov/press/goodcatch/050511_artfully_concealed...