U.S. Marines with 3rd Battalion, 3rd Marine Regiment, 3rd Marine Division, 3rd Marine Expeditionary Force participate in Weapons and Tactics Instructor (WTI) 1-15 in Yuma, Ariz., Sept. 26, 2014.
WTI 1-15 is a seven-week training event that 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. (DoD photo by Cpl. Xzavior T. McNeal, U.S. Marine Corps/Released). Original public domain image from Flickr