U.S. Air Force Master Sgt. Paul Serafini, C-130 Hercules loadmaster with the 914th Airlift Wing, Niagara Falls Air Reserve Station, N.Y., watches for enemy threats out the troop door window prepared to dispense countermeasures during Maple Flag in Edmonton/Cold Lake, Alberta, Canada, June 3, 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 Master Sgt. John R. Nimmo, Sr./Released)