As his new bride, Amanda, and her friends chuckle at stories over dinner, Jack Self stares in silence. He doesn't laugh much anymore. Jack has spent half of the last two years patrolling the cities of Iraq, dodging sniper fire and roadside bombs, and watching friends die. The 26-year-old Marine corporal no longer sees the humor in everyday life.

http://www.veteransforcommonsense.org/?Page=Article&ID=3545