North American air defense command Digs 3-story operations center into Cheyenne Mountain. RMN, December 10, 1961, p.18 200 miners strike; $66 million NORAD cave project halted. Post, December 20, 1961, p.1 Post, December 21, 1961, p.2 Miners head back to job for NORAD today. Post, December 22, 1961, p.1 Post, December 23, 1961, p.22 Ballistic missiles early warning system of the 9th Aerospace Defense Division is assigned to Air Defense Command Post, January 5, 1962, p.1