Some time has past, but in case you missed it, there was a bit of news buzz claiming that boxing might have had something to do with the Boston bomber's craziness.
Tamerlan Tsarnaev, the older brother who died, trained as a boxer. CNN put up an article soon after the brothers were identified suggesting boxing was a contributing factor. The article was widely panned, and I'm not going to give that drivel a link. Instead of that, you should check out the Los Angeles Times piece in defense of boxing, if you missed it.