A U.S. Marine assigned to 1st Battalion, 5th Marine Regiment, 1st Marine Division provides security while an AV-8B Harrier flies overhead during Weapons and Tactics Instructor Course (WTI) 2-15 at Del Valle Park, Twentynine Palms, Calif., April 17, 2015. WTI is a seven-week event hosted by Marine Aviation Weapons and Tactics Squadron One (MAWTS-1) cadre. MAWTS-1 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. (U.S. Marine Corps photo by Lance Cpl. Jodson B. Graves, 2d MAW Combat Camera/Released)