U.S. Air Force Senior Airman Kevin Foley, crew chief, 914th Airlift Wing, Niagara Falls Air Reserve Station, N.Y., checks the oil on the number 2 engine of a C-130 Hercules aircraft during Maple Flag 47 in Edmonton/Cold Lake, Alberta, Canada, May 30, 2014. Maple Flag is an international exercise designed to enhance the interoperability of C-130 aircrews, maintainers and support specialists in a simulated combat environment. (U.S. Air Force photo by Tech. Sgt. Matthew Smith)