Lt. Gen. William H. Etter, Commander of Continental U.S. North American Aerospace Defense Command Region - 1st Air Force, performs pre-flight checks on an F-16 Fighting Falcon from the New Jersey Air National Guard's 177th Fighter Wing at the Atlantic City Air Guard Base, N.J. on April 3, 2014. (U.S. Air National Guard photo by Master Sgt. Andrew J. Moseley/Released)