Up to 800 civilians and 12 soldiers died during a student protest for democracy at Tiananmen Square, Beijing, China.
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Animal fossils found in North Carolina became the oldest known in the US.
More than 100,000 people attended a vigil in Hong Kong to commemorate the Tiananmen Square Massacre.
SpaceX's Falcon 9 rocket successfully launched on its maiden flight.
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Armando Socarras Ramirez arrived in Madrid from Havana after hiding inside the wheel pod of a plane.
