Self-explanatory
source: http://www.theweatherprediction.com/weatherpapers/024/index.html
From the looks of this aerial image, one would never guess (without a-priori knowledge) that there used to be a huge 4-story concrete blockhouse sitting here. It`s like it never existed.
The following 2003 photos contributed by Mark Morgan, Radomes Staff and WADS Historian
These photos show the demolition of the Grand Forks Air Defense Sector SAGE Direction Center. After its use as a SAGE DC the building was the home of SAC`s 321st Strategic Missile Wing.
From the web site http://www.mnwg.cap.gov/cp/4ctg/Pictures_e.htm
From http://www.cevp.com/docs/COLDWAR/1999-11-02132.pdf, contributed by Ronald G Plante