From left, Lt. Gen. William H. Etter, Commander of Continental U.S. North American Aerospace Defense Command Region - 1st Air Force, and Staff Sgt. Ben Ellis, crew chief from the New Jersey Air National Guard's 177th Fighter Wing at the Atlantic City Air Guard Base, perform pre-flight checks on April 3, 2014. (U.S. Air National Guard photo by Master Sgt. Andrew J. Moseley/Released)