images of the war in this valley were captured by journalist sebastian younger and the late tim hetheringtonled earlier this year in libya. the two men imbedded with the 173rd air born while on assignment for "nightline" in 2007. >> that's artillery going in right now. >> reporter: and would later use that same footage to make the award-winning documentary "restrepo," named after a platoon medic killed in battle. just one of the 6,000 u.s. troops who have lost their lives in afghanistan and iraq. but tonight, we ask, what about the men who made it home? it's a different kind of expedition. this time, no sniper fire or ieds to worry about. just the sounds of the colorado river's rushing waters. it's a program called "outward bound for veterans." designed to help returning warriors come to terms with civilian life. >> when i was in afghanistan, i watched people die for each other. and i come back to a society that honks at me if i've taken too long to make a right hand turn. >> reporter: for many of these guys, surviving the war was the easy part. it's life at home that's hard. >> i didn't get