U.S. Marines assigned to Marine Wing Support Squadron 271 conduct a tour of a water treatment facility for students of Weapons and Tactics Instructor Course (WTI) 2-15 on Site 50 training area near Wellton, Ariz., March 21, 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 ComCam/Released)