190402-M-AJ435-0606 YUMA, Ariz. (April 2, 2019) U.S. Marine Corps Sgt. Matthew Lindstrom, a helicopter mechanic with Marine Light Attack Helicopter Squadron (HMLA) 167, Marine Aircraft Group 29, 2nd Marine Aircraft Wing, fires a GAU-17/A in support of an offensive air support exercise during Weapons and Tactics Instructor (WTI) course 2-19 in Yuma, Arizona, April 2, 2019. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron (MAWTS) 1, which emphasizes operational integration of the six functions of Marine Corps aviation in support of a Marine Air Ground Task Force. WTI also 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 photo by Lance Cpl. Levi J. Guerra/Released)