TYNDALL AIR FORCE BASE, Fla. - Lt. Gen. William Etter, (left), Continental U.S. NORAD Region - 1st Air Force (Air Forces Northern) commander, discusses the different mission sets with Adm. Bill Gortney, North American Aerospace Defense Command-U.S. Northern Command commander, as the admiral views mission photographs in the halls of the 601st Air Operations Center. (U.S. Air Force Photo by Mary McHale/Released)