The Russians weren't supposed to have atomic weapons. Not yet. Not in 1949. But there was no denying (President Harry S. Truman did try) that the seismic data the American military collected looked ...

For the first time in 16 months, a nuclear cloud columned up and spread its cauliflower shape above the earth. At 6:30 one morning a robot control, operated by perforated tape, was set in motion to ...