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North Korea invades South Korea, starting the war.
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Soviet Union leader Joseph Stalin proclaims to have atomic bomb.
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Queen Elizabeth II succeeds King George VI to the British throne and proclaimed Queen of the United Kingdom
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Dr Jonas Salk announces vaccine to prevent polio
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US President Dwight D. Eisenhower in news conference is first to voice fear of a "domino-effect" of communism in Indo-China.
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Rosa Parks is arrested for refusing to move to the back of a bus and give her seat to a white passenger in Montgomery, Alabama.
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First transatlantic telephone cable goes into operation from Newfoundland to Oban.
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USSR launches Sputnik 2 with a dog (Laika), 1st animal in orbit.
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US Supreme Court orders the all-white Central High School in Little Rock, Arkansas to integrate
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Luna 1 (Mechta) becomes 1st craft to leave Earth's gravity