Cavalier (N.D.) Chronicle article about the renaming of Cavalier Air Station
(formerly the Safeguard PAR), 2 Mar 2000.
Also has history of various names for the installation over the years.
"The Perimeter Acquisition Radar (PAR) site, in Beaulieu Township near Concrete, was constructed
in the early 1970s as part of the Department of Defense anti-ballistic missile system known as Safeguard"
"The area's massive concrete 'prairie pyramid' military radar site has become well-known around
the world. It stands like a Mayan temple on the flat North Dakota landscape."