President Truman announced to the people of America that they successfully developed a hydrogen bomb.
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Nearly one million people protested for the disarmament of nuclear weapons in Central Park, New York City.
Albert Einstein warned against hydrogen bombs on the ''Today with Mrs. Roosevelt" weekly TV show.
Machine guns were fired from a US airplane for the first time.
An unidentified double flash of light was detected over the Indian Ocean south of Africa.
Samuel Colt patented the multi-shot revolving cylinder gun.
