WikiLeaks published the first US diplomatic cable leak provided by Chelsea Manning.
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The Perseverance rover successfully landed on Mars.
Actor Yul Brynner starred in an anti-smoking ad campaign while dying of smoking-related lung cancer.
The Republic of Gambia gained its independence from the United Kingdom.
Queen Elizabeth II knighted English fantasy author Terry Pratchett.
American astronomer Clyde Tombaugh discovered Pluto.