DOWN RANGE HOWITZER U.S. Marines fire an M777-A2 howitzer down range during Integrated Training Exercise 2-15 on Camp Wilson at Marine Corps Air Ground Combat Center in Twentynine Palms, Calif., Jan. 31, 2015. The Marines are assigned to 1st Battalion,12th Marine Regiment. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 673146-K-IWY48-786.jpg Photo Gallery