Colombia’s militant group FARC agreed to lay down their weapons after 52 years of guerilla warfare.
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Nine thousand scientists from 43 nations signed a petition to ban nuclear testing.
Machine guns were fired from a US airplane for the first time.
The United States conducted its first and only nuclear artillery test at the Nevada Test Site.
President Truman announced to the people of America that they successfully developed a hydrogen bomb.
Albert Einstein warned against hydrogen bombs on the ''Today with Mrs. Roosevelt" weekly TV show.
