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b'U.S. Marines with Marine Aviation Weapons and Tactics Squadron One (MAWTS-1) prepare for an aerial gunnery refinement drill in support of Weapons and Tactics Instructor course (WTI) 1-18 at Chocolate Mountain, Aerial Gunnery Range, Calif., Sept 25, 2017. WTI is a seven-week training even hosted by MAWTS-1 cadre, which emphasizes operational integration of the six functions of Marine Corps Aviation in support of a Marine Air Ground Task Force and provides standardized advance 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 video by Cpl. Charnelle Smith)'