Are ND's more common than you'd think?

Pretty open ended question. Are Negligent discharges relatively common? While I was in the army, my team leader shot himself in the calve while doing some concealed carry drills, and a guy at work today shot his gun off in the parking lot on accident. I feel like even knowing two guys who had ND's is too many. via /r/CCW http://ift.tt/2g3x6Qu