07/04/2015: U.S. Marines conduct an assault support exercise during Weapons and Tactics Instructor (WTI) Course 2-15 at Stoval Airfield near Dateland, Ariz., April 13, 2015. WTI is a seven week event hosted by Marine Aviation Weapons and Tactics Squadron One (MAWTS-1). MAWTS-1 provides standardized tactical training and certification of unit…