Must be pretty comfortable, but also very hot. It looks like a catchers vest and the straps hook together in the back.
At least that's what I think it was. The auditorium had allot of ticketed seating for the students and faculty and Doubt they ever take any chances since Reagan.
A .22 or .32 can be fired from any type of undetectable non-metalic gizmo.(zip-gun)
Any moron knows that a radio receiver can be hidden entirely in the ear, complete with batteries.
The idea that Bush was carrying a transceiver on his back near the shoulder blades is the most idiotic claim I have heard yet.