U.S. Air Force Staff Sgt. Tommy Grimes, a Broadcast Journalist assigned to 4th Combat Camera Squadron, cleans a pair of eyeglasses while documenting U.S. Marine operations during Integrated Training Exercise 3-15, at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., 20 May, 2015. MCAGCC conducts relevant live-fire combined arms training, urban operations, and joint/coalition level integration training that promotes operational forces readiness. (U.S. Air Force photo by Senior Airman Juan A. Duenas/Released)