Here is one from a few years ago: http://en.wikipedia.org/wiki/Personnel_halting_and_stimulation_response_rifle http://en.wikipedia.org/wiki/Personnel_halting_a

Here is one from a few years ago: http://en.wikipedia.org/wiki/Personnel_halting_and_stimulation_response_rifle http://en.wikipedia.org/wiki/Personnel_halting_and_stimulati...