An Alabama Air National Guard F-16C Fighting Falcon aircraft taxis at Mirgorod Air Base, Ukraine, July 16, 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-27s and Mig-29s, and Polish F-16s in preparation for the 2012 London Olympics and 2012 EUROCup and 2014 Winter Games in Europe.