U.S. Marine Corps CH-46 Sea Knight helicopters land at Stoval Airfield, Ariz., Oct. 9, 2010, to be refueled by a KC-130 Hercules aircraft crew. The refueling was conducted by Marine Corps KC-130 pilots and prospective weapons and tactics instructors as part of a training mission for Weapons and Tactics Instructor Course 1-11, which is hosted by Marine Aviation and Weapons Tactics Squadron 1. (DoD photo by Cpl. Benjamin R. Reynolds, U.S. Marine Corps/Released)