Adolf Hitler formed the Schutzstaffel, the infamous paramilitary organization known to most as the SS.
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The Kangra earthquake in India killed over 20,000 people.
Elon Musk bought a 9.2% stake in Twitter, amounting to $2.9 billion.
Beyoncé and Jay-Z married with only 40 guests present on their special day.
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.
