ON THEIR WAY U.S. Marines wait to leave the Air Ground Combat Center at Twentynine Palms, Calif., and deploy to the Pacific with the 31st Marine Expeditionary Unit, Jan. 5, 2010. The Marines are assigned to the 2nd Battalion, 7th Marine Regiment. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 955662-G-TSS32-978.jpg Photo Gallery