A U.S. Marine Corps CH-53E Super Stallion helicopter prepares to refuel from a KC-130J Super Hercules aircraft while conducting an external lift of a Humvee April 4, 2014, at Landing Zone Bull Assault near Yuma, Ariz., during Weapons and Tactics Instructor Course 2-14. The course, hosted by Marine Aviation Weapons and Tactics Squadron 1, was designed to teach the six functions of Marine Corps aviation while providing the closest experience to real combat strategy, tactics and execution. (U.S. Marine Corps photo by Lance Cpl. Adrianna R. Lincoln/Released)