Elon Musk bought a 9.2% stake in Twitter, amounting to $2.9 billion.
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The Kangra earthquake in India killed over 20,000 people.
The 21st Commonwealth Games officially began on the Gold Coast, Queensland, Australia.
Finland officially joined NATO, becoming the 31st member of the security alliance.
NASA's Challenger Space Shuttle was launched from Florida on its maiden voyage.
Beyoncé and Jay-Z married with only 40 guests present on their special day.
