A military convoy--two humvees, an ambulance and three five-ton trucks full of civilian evacuees--is bumping its way along a snow-swept high-plains dirt road. Suddenly a shout comes down the line: "Contact front!" It's an ambush, with gunmen on both sides of the road. Soldiers on top of the five-tons return fire with mounted machine guns. The clatter is deafening. The truck beds fill up with hot, bouncing, jingling brass shell casings.
A few of the civilians wave at the attackers, who continue to blast away. The convoy drives on, past the fray. The rear humvee, its driver obviously bored with the...