Shamus Reid, a post-traumatic stress disorder service dog for Cpl. Kyle Reid, watches his owner swim laps at the pool at Marine Corps Base Camp Pendleton, Calif., Mar. 10, 2014. Kyle Reid participates in swimming and track at the 2014 Marine Corps Trials, which is made to help wounded, ill or injured Marines to focus on their abilities and find new avenues to thrive. (U.S. Marine Corps photo by Cpl. Ally Beiswanger/Released)