First Lt. George Collins' quick thinking helped his platoon escape a 2006 ambush in Iraq with no casualties. All 11 insurgents involved with the ambush are believed to have been killed. (Photo courtesy of George Collins)

First Lt. George Collins’ quick thinking helped his platoon escape a 2006 ambush in Iraq with no casualties. All 11 insurgents involved with the ambush are believed to have been killed. (Photo courtesy of George Collins)