U.S. Army Spc. Justin Barnett fires a .50-caliber heavy machine gun during a live-fire exercise at the 7th Army Joint Multinational Training Command's Grafenwoehr Training Area, Germany, Feb. 4, 2014. U.S. Army Spc. Justin Barnett fires a .50-caliber heavy machine gun during a live-fire exercise at the 7th Army Joint Multinational Training Command's Grafenwoehr Training Area, Germany, Feb. 4, 2014. SHARE: Download: Full Size (1.81 MB) Tags: Photo Essays Credit: VIRIN: 727868-I-NTY17-880.jpg Photo Gallery