Editor And Publisher thinks they have a scoop:
It was bound to happen sooner or later, and in what newspapers in Kentucky are calling a first, one American has killed another in a dispute over the Iraq war.
As it happens, the first incident I remember where one American killed another in a dispute over the liberation of Iraq was when Sgt. Asan Akbar threw grenades into the tents of his fellow soldiers back in March 2003.
DOWNDATE: And, of course, there's also the tragic case of Pat Tillman and doubtless other friendly fire casualties, though admittedly, that's not quite the same thing.