Free republic has many threads where law abiding gun owners act in self defense. They have much happier endings than this Greyhound bus one.
I can't find it now, but one of my favorites happened in Spain, when a tour bus was attacked by bandits, apparently a common practice in Europe. The robbers thought they were preying on a bunch of defenseless elderly Americans- until a retired officer pulled out his service revolver. Now the bandits are taking the proverbial dirt siesta.
The one I remember, maybe you are thinking about the same one, was where a man in his 70’s, former military, was on a bus in South America, when a man or men tried to pull some stunt—probably robbery—on the bus. The American in his 70’s killed the man with his bare hands—broke his neck. I had compiled a list of these former military men that had stepped up—I’ll try to find it.
Well, I couldn’t find the list I thought I had compiled about
former military men/Marines stepping up, but I did find the one I was thinking about that happened in South America. Maybe a different story than the one you are talking about:
US Tourist Kills Mugger With Bare Hands
http://www.freerepublic.com/focus/f-chat/1897121/posts
I just wish someone/several someones had been on that bus with some kind of training or a weapon to come to Tim McLean’s aid. Even if it had been too late for the victim, at least it would have been a slight ray of light in this gruesome story and the poor guy’s body wouldn’t have been butchered up.