TYNDALL AIR FORCE BASE, Fla. - Adm. Bill Gortney (left), North American Aerospace Defense Command and U.S. Northern Command commander, talks with Lt. Gen. William Etter, Continental U.S. NORAD Region -1st Air Force (Air Forces Northern) commander, during a recent mission-familiarization visit at Tyndall Air Force Base, Fla. During his visit, Gortney received a mission briefing and toured the 601st Air Operations Center. (U.S. Air Force Photo by Senior Airman Alex Echols III/Released)