Marines participate in a three-mile training run along a fitness test track at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., April 4, 2014. The purpose of the run was to foster esprit de corps within the battalion, build unit cohesion and condition physical performance. The Marines are assigned to Headquarters Battalion. Marines participate in a three-mile training run along a fitness test track at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., April 4, 2014. The purpose of the run was to foster esprit de corps within the battalion, build unit cohesion and condition physical performance. The Marines are assigned to Headquarters Battalion. SHARE: Download: Full Size (3.8 MB) Tags: photo essays, week in photos, week in photos Credit: VIRIN: 943063-M-KGX69-375.jpg Photo Gallery