Marines with 2nd Battalion, 7th Marine Regiment, disembark a CH-46 Chinook helicopter during a squad competition at the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Feb. 12, 2014. The helicopter provided initial transport to the nearly 10-mile course, where squads then navigated the different obstacles on their own. (U.S. Marine Corps photo by Lance Cpl. Charles Santamaria/Released)
