http://en.wikipedia.org/wiki/Beltway_sniper_attacks http://en.wikipedia.org/wiki/Beltway_sniper_attacks - Committed by a Gulf War veteran. This is the only on

http://en.wikipedia.org/wiki/Beltway_sniper_attacks http://en.wikipedia.org/wiki/Beltway_sniper_attacks - Committed by a Gulf War veteran. This is the only one I can think of off the top of my head, but I remember several other incidents through the years in which a former soldier shot up a public place or killed innocent civilians here in the US. I can't offer any statistics about the relative percentage when compared with postal workers, but it would be interesting to see, I think.