AEDC Visitor Center closing for the holidays Published Dec. 14, 2012 By Raquel March AEDC/PA ARNOLD AIR FORCE BASE, Tenn. -- The Arnold Engineering Development Complex (AEDC) Visitor Center will close during the Christmas and New Year holiday from Dec. 22 - Jan. 1. Personnel who are working during this time and have an emergency need for a common access card (CAC) that would result in a work stoppage may contact the base Operations Center at 454-7752 for emergency assistance. Personnel requiring base access during this time who have lost or forgotten their base entry badge or CAC may contact the Base Defense Operations Center at 454-5662 to arrange for an Air Force Form 75 or a temporary badge as applicable. The Visitor Center will reopen at 6:30 a.m. on Jan.2.