The 21st Commonwealth Games officially began on the Gold Coast, Queensland, Australia.
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Martin Luther King Jr. was assassinated.
Elon Musk bought a 9.2% stake in Twitter, amounting to $2.9 billion.
The Declaration of Breda document was issued by the exiled King Charles II of England.
New York City's Twin Tower World Trade Center was officially opened.
NASA's Challenger Space Shuttle was launched from Florida on its maiden voyage.
