Sgt. Sean Cain performs a radio check during a security patrol. U.S. Marine Corps Sgt. Sean Cain, with Charlie Company, 1st Battalion, 5th Marine Regiment, performs a radio check during a security patrol in the Nawa district of the Helmand province, Afghanistan, on Nov. 9, 2009. The 1st Battalion, 5th Marine Regiment is a ground combat element deployed with Regimental Combat Team 7, which conducts counterinsurgency operations in partnership with Afghan National Security Forces in southern Afghanistan. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 316941-D-LQH40-200.jpg Photo Gallery