The climate change rally led by activist Greta Thunberg saw millions of protesters worldwide standing up for urgent action.
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The US military policy 'don't ask, don't tell' came to an end.
Spanish navigator Ferdinand Magellan and crew set off aboard the Victoria on their adventure around the globe.
Maryland passed its first anti-amalgamation law.
The Siege of Jerusalem began and lasted for 12 days.
The first Whole Foods store opened in Austin, Texas, US.