U.S. Air Force Staff Sgt. Robert Farland, 570th Global Mobility Squadron, Travis Air Force Base, Calif., marshals in a U.S. Air Force C-17 Globemaster III aircraft to Geronimo landing zone during a field exercise at the Joint Readiness Training Center, Fort Polk, La., Oct. 11, 2012. JRTC 13-01 is designed to prepare and educate U.S. military service members in a simulated combat environment.