Cpl. David A. Mackay conducts a security patrol in Sangin. U.S. Marine Corps Cpl. David A. Mackay with India Company, 3rd Battalion, 7th Marines, Regimental Combat Team 8, conducts a security patrol in Sangin, Afghanistan, on Dec. 8, 2011. The patrols help to maintain safety in the surrounding areas. DoD photo by Lance Cpl. Armando Mendoza, U.S. Marine Corps. (Released) SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 773986-C-LHY11-220.jpg Photo Gallery