Sgt. Travis P. Trahan, a UH-1N Huey crew chief with Detachment A, Marine Light Attack Helicopter Squadron 773, Marine Aircraft Group 49, 4th Marine Aircraft Wing, checks his map for building locations during a simulated close air support mission at Fort Irwin, Calif., Oct. 17, 2012. HMLA-773 has three detachments, one at Robbins Air Force Base, Ga., another at Naval Air Station Joint Reserve Base Belle Chasse, La., and the last at Joint Base McGuire-Dix-Lakehurst, N.J. (U.S. Marine Corps Photo by Cpl. Nana Dannsa-Appiah/Released)