UFO Article:
“UFO Hovered Near Missile Launch 
Control Center at Minot AFB”,
by Robert L. Hastings, 19 September 2012 
(UFOs and Nuclear Weapons)

Robert L. Hastings presents an interview with retired U.S. Air 
Force Captain David D. Schindele regarding a UFO incursion 
that occurred at Minot Air Force Base’s ICBM launch sites 
(at November Flight) in the summer of 1966:

http://www.ufohastings.com/articles/ufo-hovered-near-missile-launch-control-center-at-minot-afb

Hastings also presents a The Minot Daily News article and a declassified U.S. government UFO document which reveal that yet another UFO incursion occurred at Minot AFB on 25 August 1966. This incident occurred at a different Launch Control Center (LCC), 

Mike Flight.

Quote from the article:

“Schindele's experience may or may not be related to the UFO incursion mentioned in the newspaper article above. 
A declassified document confirms that the August 25, 1966 event took place at Mike Flight, which is adjacent to November Flight.”

Aerial view of Minot Air Force Base, North Dakota
(wikimedia.org photo)