A U.S. Marine Corps air crewman scans the river valley below for threats. A U.S. Marine Corps air crewman scans the river valley below for threats while flying over Nawa district, Helmand province, Afghanistan, on Aug, 22, 2009. The 1st Battalion is deployed with Regimental Combat Team 3 to conduct counterinsurgency operations in partnership with Afghan security forces in southern Afghanistan. SHARE IMAGE: Download Image: Full Size (0.04 MB) Photo By: VIRIN: 185819-F-DUR46-714.jpg Photo Gallery