Two Air National Guard F-16s fly in formation with 2 Ukraine SU-27s over Mirgorod Air Base, Ukraine while a chase plane sits in the background. The Air National Guard is in Ukraine supporting SAFE SK

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Two Air National Guard F-16s fly in formation with 2 Ukraine SU-27s over Mirgorod Air Base, Ukraine while a chase plane sits in the background. The Air National Guard is in Ukraine supporting SAFE SKIES 2011, a 2-week multinational flying event preparing Ukraine and Poland to better protect their airspace during the 2012 EUROPCUP. (U.S. Air Force Photo by Master Sgt. James D. Berg, 144 FW/CF / Released)

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