U.S. soldiers set up an Mk-48 machine gun at an observation post to provide security during a patrol with Afghan soldiers in Afghanistan's Paktia province, Oct. 21, 2013. U.S. soldiers set up an Mk-48 machine gun at an observation post to provide security during a patrol with Afghan soldiers in Afghanistan's Paktia province, Oct. 21, 2013. SHARE: Download: Full Size (1.8 MB) Tags: Photo Essays Credit: VIRIN: 201036-D-FBA15-807.jpg Photo Gallery