bombs to the post office and there may be more than one bomber here. there may be an accomplice as well. they could carry -- the thing about carrying ten bombs, frank's point, they might have been mailed at once, could have been mailed multiple times. think about lugging these things around in your vehicle, as clint would say, pre-offense behavior we -- >> say that again. >> pre-offense behavior, just before. you can't safely lug these kind of contraptions around without the risk of them blowing up on you unless you have a safe arm switch. a safe arm switch would be that digital alarm clock that would be what i would think it is. and he would set the alarm clock for a couple hours ahead, drop in the post office and then until that alarm clock armed the circuit, they would not detonate. once the victim received the envelop, pulled the switch, the bomb could detonate. >> all right, we're going to take a quick break. we have so much more to talk