WTI 2-17 Globemaster III
U.S. Marine Corps Sgt. Joseph W. Brehm, air traffic controller at Marine Corps Air Station Yuma, observes an Air Force C-17 Globemaster III from the 3d Airlift Squadron conduct low approaches in support of Weapons and Tactics Instructors Course (WTI) 2-17 at Auxiliary Airfield II, Yuma, Ariz., April 19, 2017. WTI is a seven-week training evolution hosted by Marine Aviation Weapons and Tactics Squadron One cadre which emphasizes operational integration of the six functions of Marine Corps aviation and certification of a unit instructor qualifications to support Marine Aviation Training and Readiness and assist in developing and employing aviation weapons and tactics. (U.S. Marine Corps photo by Chief Warrant Officer 3 Jorge A. Dimmer)