Official Seal of the U.S. Air Force. This seal may not be used in any way which implies Air Force indorsement. Permission for other than authorized DoD use must be granted in writing by Air Force Historical Research Agency, 600 Chennault Circle, Maxwell Air Force Base, Alabama 36112-6424. Commercial phone 205-953-2960; FAX 205-953-4096. DSN 493-2960; DSN FAX 493-4096