HOWITZER TRAINING U.S. Army Sgt. Gilbert Duarte fires an M777A2 howitzer during a live-fire exercise at the Joint Multinational Training Command's Grafenwoehr Training Area in Germany, April 30, 2015. Duarte is assigned to the 4th Battalion, 319th Airborne Field Artillery Regiment, 173rd Airborne Brigade. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 802017-U-WND60-947.jpg Photo Gallery