The Pink Star Diamond sold for a record USD 71 million in Hong Kong.
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Adolf Hitler formed the Schutzstaffel, the infamous paramilitary organization known to most as the SS.
Jack Ma founded Alibaba Group Holding Limited.
Beyoncé and Jay-Z married with only 40 guests present on their special day.
Finland officially joined NATO, becoming the 31st member of the security alliance.
The 21st Commonwealth Games officially began on the Gold Coast, Queensland, Australia.
