Liberty Gate Closure Published Aug. 12, 2011 ELLSWORTH AIR FORCE BASE, S.D. -- The Ellsworth Air Force Base Liberty Gate will be closed for a ribbon cutting ceremony from 1 to 3:30 p.m., Aug. 25. The 28th Security Forces Squadron Visitor Control Center will be open; however, motorists should use the Patriot Gate or Bismarck Gate during this time.