U.S. Marines clear a roof. U.S. Marines with 1st Battalion, 8th Marine Regiment clear a roof during a clear, hold and build exercise at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., on Jan. 20, 2009. The Marines are training for an upcoming deployment. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 935265-V-DRA96-048.jpg Photo Gallery