Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
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The Soviet R-7 Semyorka, the world's first Intercontinental ballistic missile, became operational.
Albert Einstein warned against hydrogen bombs on the ''Today with Mrs. Roosevelt" weekly TV show.
France became the fourth nuclear-capable nation following its successful Gerboise Bleue atomic test.
Samuel Colt patented the multi-shot revolving cylinder gun.
The United States and Russia signed the Moscow Treaty, agreeing to limit their nuclear arsenals.
