Saber Strike 15
Senior Airman Cody Prelec, Pennsylvania Air National Guard crew chief, changes the oil on a KC-135 Stratotanker engine June 9, 2015 at Riga International Airport, Latvia. Guardsmen from Maryland, Michigan and Pennsylvania came together to support Saber Strike 15 by providing aerial-refueling and close air support. Saber Strike 15 is a joint and multinational exercise designed to promote stability in the Baltic area and provide an opportunity for military members to sharpen their skills. (U.S. Air Force photo/ Staff Sgt. Armando A. Schwier-Morales)