When I was a kid stationed in DaNang, RVN there were very large ammo barges anchored out in the harbor. The U.S. kept armed guards stationed 24/7, I had done guard duty on them a couple of times as I was stationed in the harbor. We were watching a movie around six miles away, it was on an outdoor screen with an amphitheater of sorts with seating and covered walkways surrounding it. The place had been a Navy hospital, when they pulled out we moved in. Some of us were on the roof of the sidewalk smoking dope, while the juicers were in the seats. From behind us there was enough of an explosion to light up the movie screen, most turned to see what the hell it was, somebody had presence of mine to yell "HIT IT!" in unison we all flattened out and BOOOOMMMM the blast wave hit us, bouncing us on the roof. I looked up and that picture from Beirut is the closest thing I have ever seen to the fireball and mushroom cloud outside of a atomic bomb picture. The next day we learned that the sappers had indeed finally got through and blew one up. Our 150' L.C.U.'s were beached where they had been docked, it was a mess. Charlie was nothing if not patient and persistent. I remember at least a half a dozen sappers got caught swimming up to the barges, they would shoot them up and a couple of time we went out to pick up the dead. Someone at the top did not like the idea of new guys or weeds being armed with fully auto M-16's which truly do a number on a human body when a full magazine is unloaded, so they took the M-16's away and issued riot shotguns...I remember feeling more vulnerable and virtually helpless if someone was on the other side of the barge.