A U.S. Marine Corps KC-130J Hercules flies in formation during an aerial refuel during Weapons and Tactics Instructor Course (WTI) 2-15 near Yuma, Ariz., April 16, 2015. WTI is a seven-week event hosted by Marine Aviation Weapons and Tactics Squadron One (MAWTS-1) cadre. MAWTS-1 provides standardized tactical training and certification of unit instructor qualifications to support Marine aviation Training and Readiness and assists in developing and employing aviation weapons and tactics. (U.S. Marine Corps photo by Lance Cpl. Jodson B. Graves, 2d MAW Combat Camera/Released)