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| View Original: | 10_Oct_1961_Cheyenne_Mt.,_Ext_const,_rails.jpg (1886x1511) | |||
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| Keywords: 10 Oct 1961 Cheyenne Mt., Ext const, rails.jpg NORAD blast doors Cheyenne Mountain Colorado USAF photo URL https //www cheyennemountain af mil PD-USGov Construction of Cheyenne Mountain Complex Rail transport in Colorado 1961 in Colorado | ||||
