Where I used to work, Custom Officers would come on the premises to inspect shipping and sometimes as part of that inspection they needed to open boxes, so they all carried box cutters. Shortly after 9/11, the company installed metal detectors and we all had to go through them, even the customs folks. One of the officers told me that as he went through the metal screening, our crack security folks took away his box cutter but didn't have a problem with the Sig 40cal on his belt.
We all felt safer from then on.
