Dictator Efraín Rios Montt declared himself the president of Guatemala.
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Robert Goddard was granted a patent for the rocket-powered aircraft.
The sci-fi movie 'Star Trek V: The Final Frontier' was released in the US.
A peace treaty was signed between NATO, Yugoslavia, and Serbia.
Rock star Paul McCartney's 'Ram' album went Gold.
Soviet Space Program's Vega 1, which was launched on December 15, 1984, released a space probe to enter Venus.
