U.S. Marines participating in Weapons and Tactics Instructor (WTI) Course 1-16, conduct an aerial gunnery with GAU-17 Minigun and GAU-18 M2 machine gun .
U.S. Marines at Weapons and Tactics Instructor (WTI) Course 1-16, conduct an aerial gunnery exercise in UH-1Y Venom helicopters near Yuma, Arizona on .
U.S. Marine Corps crew chiefs aboard UH-1Y Venom helicopters perform door gunner duties during close air support training operations at Chocolate Mountain .
Marine Corps Helicopter Crew Chiefs go through machine gunner close air support training aboard UH-1Y Super Hueys at Chocolate Mountain Aerial Gunnery .