Cpl. Joshua Payne, a crew chief with Marine Medium Tiltrotor Squadron (VMM) 161 and a Spring, Texas, native, guides the pilots of an MV-22B Osprey to an unprepared field during casualty-evacuation training aboard Marine Corps Base Camp Pendleton, Calif., Jan. 20. Casualty-evacuation training prepares the Marines to land in a combat zone, pick up injured Marines and transport them to a safe area. - Cpl. Joshua Payne, a crew chief with Marine Medium Tiltrotor Squadron (VMM) 161 and a Spring, Texas, native, guides the pilots of an MV-22B Osprey to an unprepared field during casualty-evacuation training aboard Marine Corps Base Camp Pendleton, Calif., Jan. 20. Casualty-evacuation training prepares the Marines to land in a combat zone, pick up injured Marines and transport them to a safe area.