A combat instructor at the Infantry Training Battalion observes as a female student removes her pack after failing to keep up with the other students on a 5-kilometer hike during the first week of training at Marine Corps Base Camp Geiger, N.C., Sept. 28, 2013. Students will be counseled for failing any of the first three hikes during their training, but must pass the 20-kilometer hike midway through the cycle to continue training. Fifteen female Marines were given the opportunity to attend the training after boot camp for the first time in Marine Corps history as part of ongoing research into the acceptance of women into combat-related job fields. The female Marines go through the same training and are held to the same ITB standards as their male counterparts. (U.S. Marine Corps photo by Cpl. Chelsea Flowers Anderson/Released)