U.S. Marines conduct maintenance on a CH-53E Super Stallion in support of Weapons and Tactics Instructor (WTI) course 2-14 at Marine Corps Air Station Yuma, Ariz., March 31, 2014. WTI is a seven week training event hosted by Marine Aviation Weapons and Tactics Squadron One (MAWTS-1) cadre. MAWTS-1 provides standardized advanced 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 photograph by Lance Cpl. Adrianna R. Lincoln, COMCAM/ Released)