Finland officially joined NATO, becoming the 31st member of the security alliance.
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NASA's Challenger Space Shuttle was launched from Florida on its maiden voyage.
The Pink Star Diamond sold for a record USD 71 million in Hong Kong.
Martin Luther King Jr. was assassinated.
New York City's Twin Tower World Trade Center was officially opened.
Moscow was mentioned for the very first time in historical records when two princes met there for a great banquet.
