And now, for something completely different, the two-minute video below.  Deployed during the early sixties when I was an Army grunt, the M29 was a three-man tripod-mounted recoilless rifle that fired a version of the 50-pound W54 atomic warhead, a 76-lb shell with an 18-ton (NOT kiloton) yield against battlefield targets a mere three miles away.  It was not precisely accurate, and thus was considered to be primarily an anti-personnal and anti-tank weapon since it’s detonation would provide a lethal radiation dose to every enemy soldier within a radius of 500-feet, and have a high fatality rate for enemy soldiers up to one-quarter mile away.  Although it was true that the firing crew could be in jeopardy if the wind was blowing the wrong way, it was deployed in areas that might find it essential as a “weapon of last resort”, such as if and when Soviet tanks suddenly came pouring through the Fulda Gap.