Now it's a revenge thing

Marines talk of guns and God on the front lines.

Losing his friend changed McClellan's sense of mission. "Before [Burns] was killed, I thought we were here to kill the bad ones and save the good ones," says McClellan, a wry wit who sometimes jokingly refers to himself "trigger-happy Mick." "Now I think: 'Is he the one who shot Kyle?' It's a revenge thing. Every time I see an Iraqi, I could be face-to-face with the guy who killed my best friend."

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