Funny thing about my trip last week...
...myself and two other individuals from my military unit had to go somewhere for a few days. Well, as members of a certain command in the USAF, we are required to make official travel in uniform(yeah...it's fun to travel with a target on your back all in the name of recruiting). Anyway, my point is that we were all wearing the same thing. The only difference was our unique badges.
We go through security at our point of departure and my uniform is the only one that sets off the scanner. I get the "wand" but I'm spared any further checks. Well, three days later when we are going through security before flying home, again we are in our uniforms. This time, I walk right through no problem, but both of the other guys set it off. One of them even goes through the shoe removal and "happy hands" routine.
I won't pretend to be an expert on security systems, but the inconsistency just strikes me as peculiar.