LIVE-FIRE EXERCISE U.S. Marines participate in a live-fire training exercise at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., March 7, 2008. The Marines are assigned to the 7th Marine Regiment, 2nd Battalion. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 520660-I-MMM73-358.jpg Photo Gallery