Mulberry Island Half Marathon participants run over train tracks at Fort Eustis, Va., Sept. 19, 2015. As the longest-held race at Fort Eustis, the 5K and half-marathon are intended to bring the military and local communities together while giving participants a tour of the island, which was established in colonial times. (U.S. Air Force photo by Staff Sgt. Natasha Stannard/Released)