MAKE A MEME View Large Image Oct 1961 Cheyenne Mt, Int Const, tunnel work.jpg NORAD blast doors Cheyenne Mountain Colorado USAF photo URL https //www cheyennemountain af mil PD-USGov Construction of Cheyenne Mountain Complex Tunnels in Colorado 1961 in Colorado October ...
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Keywords: 26 Oct 1961 Cheyenne Mt, Int Const, tunnel work.jpg NORAD blast doors Cheyenne Mountain Colorado USAF photo URL https //www cheyennemountain af mil PD-USGov Construction of Cheyenne Mountain Complex Tunnels in Colorado 1961 in Colorado October 1961 in the United States Photographs taken on 1961-10-26
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