Holiday schedule for Arnold AFB's Visitor Center Published Dec. 30, 2008 By 208218 Arnold Air Force Base, Tenn. -- Most contractor employees at the Arnold Engineering Development Center (AEDC) will be on holiday break from Dec. 24-Jan. 2, 2009. During this period the bases delivery gate #2 will be closed. The base's Visitor Center (formerly Pass & ID) which also issues retired military ID cards will be closed on the following dates, Dec. 25-26 and Jan. 1, 2009. AEDC Police will remain fully staffed over the holiday and will enforce traffic laws on the base's public access roads.