Martin Luther King Jr. was assassinated.
He was shot at the Lorraine Motel in Memphis, Tennessee, by James Earl Ray.
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Elon Musk bought a 9.2% stake in Twitter, amounting to $2.9 billion.
Bill Gates and Paul Allen founded Microsoft.
Finland officially joined NATO, becoming the 31st member of the security alliance.
The 21st Commonwealth Games officially began on the Gold Coast, Queensland, Australia.
Jack Ma founded Alibaba Group Holding Limited.
