Handout photo dated June 8, 2015 shows Capt. Doug Mayo, a 555th Expeditionary Fighter Squadron F-16 Fighting Falcon pilot, goes through a preflight inspection with Staff Sgt. William Harris, a 455th Expeditionary Aircraft Maintenance Squadron crew chief, before a combat sortie at Bagram Airfield, Afghanistan. Ukraine won a huge boost for its troops on Wednesday as Germany and the United States announced plans to provide heavy tanks for Kyiv, ending weeks of diplomatic deadlock on the issue. Ukraine will now push for Western fourth generation fighter jets such as the U.S. F-16 after securing supplies of main battle tanks, an adviser to Ukraine's defence minister said. U.S. Air Force photo by Tech. Sgt. Joseph Swafford via ABACAPRESS.COM