Martin Luther King Jr. was assassinated.
He was shot at the Lorraine Motel in Memphis, Tennessee, by James Earl Ray.
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NASA's Challenger Space Shuttle was launched from Florida on its maiden voyage.
Moscow was mentioned for the very first time in historical records when two princes met there for a great banquet.
Jack Ma founded Alibaba Group Holding Limited.
Elon Musk bought a 9.2% stake in Twitter, amounting to $2.9 billion.
US Congress released a US flag that featured 20 stars and 13 red and white stripes.
