U.S. Marine Corps Lance Cpl. Nick Reese from 1st Tank Battalion, 1st Marine Division provides security while participating in a force on force exercise during Exercise GOLD EAGLE aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif. June 25, 2013. Exercise GOLD EAGLE is a combat arms reciprocal exchange program which allows U.S. and Australian forces to share knowledge and improve interoperability. (U.S. Marine Corps photo by Lance Cpl. Jason Morrison, 1st Marine Division Combat Camera/ Released)