Gunnery Range Soldiers fire the Avenger air defense system mounted M3P .50 caliber machine gun at ground targets during an Avenger ground gunnery range, Aug. 19, 2015, at Fort Campbell, Ky. As part of the latest security assistance package for Ukraine, the United States has pledged to provide four Avenger air defense systems, along with accompanying Stinger missiles. SHARE IMAGE: Download Image: Full Size (0.16 MB) Photo By: Army Spc. Joseph Green VIRIN: 150819-A-XD704-012M.JPG Photo Gallery