[nickcarraway]

You think our servicemen in World War II were murderers?

[nascarnation]

Not at all, but they did put emblems on the plane for each "kill" or bomb run.

http://www.warhistoryfans.com/the-meaning-of-the-war-symbols-on-a-plane-140.html

Everybody called them "kills"

It's disturbing that gang members appear to be adopting this as a macho symbol to their evil brethren.