A crewmember of an MV-22 Osprey prepares the aircraft for transport to Marine Corps Air Station Yuma, Ariz., after landing near the medical tent of the Shock Trauma Platoon, 15th Marine Expeditionary Unit, during Final Exercise I of the Weapons and Tactics Instructors Course at Sandy Hills, Combat Center training area, Oct. 14, 2014. The STP sent three role-players back to MCAS Yuma to represent casualties with severe injuries. - A crewmember of an MV-22 Osprey prepares the aircraft for transport to Marine Corps Air Station Yuma, Ariz., after landing near the medical tent of the Shock Trauma Platoon, 15th Marine Expeditionary Unit, during Final Exercise I of the Weapons and Tactics Instructors Course at Sandy Hills, Combat Center training area, Oct. 14, 2014. The STP sent three role-players back to MCAS Yuma to represent casualties with severe injuries.