The Republic of Gambia gained its independence from the United Kingdom.
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The Perseverance rover successfully landed on Mars.
WikiLeaks published the first US diplomatic cable leak provided by Chelsea Manning.
The first Ironman Triathlon was held in Kona, Hawaii, USA.
Mark Twain's Adventures of Huckleberry Finn was published in the United States.
American astronomer Clyde Tombaugh discovered Pluto.
