Over the last 2 years, I have been told by more than a few FT members that as a triggering device and a power source wasn't an "explosive", it shouldn't concern TSA, that we should stick to looking for explosives. In fact, such comments have often ridiculed TSA policy for looking for potential power sources and triggering devices. And lets not ignore the possibility that those items can be carried independently in different bags by different people and assembled on the sterile side.