DESERT HOWL U.S. Marines fire a sequence of three rounds from a M 777 Howitzer during a desert fire exercise in Twentynine Palms, Calif., May 1, 2009. The Marines are assigned to the 1st Marine Division's1st Battalion, 11th Marine Regiment. The mission is called over the radio and each gun competes to shoot first. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 212697-N-YPA98-155.jpg Photo Gallery