Adolf Hitler formed the Schutzstaffel, the infamous paramilitary organization known to most as the SS.
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Bill Gates and Paul Allen founded Microsoft.
US Congress released a US flag that featured 20 stars and 13 red and white stripes.
Elon Musk bought a 9.2% stake in Twitter, amounting to $2.9 billion.
New York City's Twin Tower World Trade Center was officially opened.
Beyoncé and Jay-Z married with only 40 guests present on their special day.
