US Congress released a US flag that featured 20 stars and 13 red and white stripes.
Source
NASA's Challenger Space Shuttle was launched from Florida on its maiden voyage.
Elon Musk bought a 9.2% stake in Twitter, amounting to $2.9 billion.
Martin Luther King Jr. was assassinated.
The Declaration of Breda document was issued by the exiled King Charles II of England.
The Pink Star Diamond sold for a record USD 71 million in Hong Kong.
