Keywords: 110722-F-DQ783-063 (5978184913).jpg Two U S Air National Guard F-16 aircraft left fly in formation with two Ukraine SU-27 aircraft over Mirgorod Air Base Ukraine July 22 2011 during Safe Skies 2011 Safe Skies is a joint U S Ukraine and Polish exercise during which Air National Guard pilots fly engagements with Ukrainian SU-27 Mig-29s and Polish F-16s in preparation for the 2012 London Olympics and 2012 EUROCup and 2014 Winter Games in Europe DoD photo by Master Sgt James D Berg U S Army/Released https //www flickr com/photos/39955793 N07/5978184913/ 110722-F-DQ783-063 2011-07-22 02 20 https //www flickr com/people/39955793 N07 U S Department of Defense Current Photos PD-USGov U S Department of Defense Current Photos https //flickr com/photos/39955793 N07/5978184913 2016-09-03 13 53 12 United States Government Work California Air National Guard United States Department of Defense |