U.S. Marine Corps Lt. Col. Thomas M. Warren, the commanding officer of 1st Transportation Support Battalion, debriefs his Marines after an external lift with Marine Heavy Helicopter Squadron (HMH) 361 during Weapons and Tactics Instructor Course (WTI) Course 2-15 at Auxiliary Airfield 2 near Yuma, Ariz., April 3, 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)