U.S. Marine Corps Lance Cpl. Theresa Hughes (left)

U.S. Marine Corps Lance Cpl. Theresa Hughes (left) and Pfc. Tanner Clayson, Marine Wing Support Squadron 372, Marine Aircraft Group 39, 3rd Marine Aircraft Wing, fill sandbags to mark landing zones on the flight line during Weapons and Tactics Instructor (WTI) course 1-15 at Sandhill on Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Oct. 13, 2014. WTI is a seven-week training event hosted by Marine Aviation and Weapons 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. Maliek Fowler, MAGTFTC HQBN Combat Camera/Released)