Mark David Chapman was sentenced to 20 years to life in prison for murdering John Lennon.
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Astronomers announced the discovery of an Earth-like planet named Proxima b.
The first installment of concrete was poured into the Panama Canal.
Ukraine separated from the Soviet Union, marking this day as Ukraine’s Independence Day.
One billion people logged into Facebook for the first time, surpassing a major milestone.
Donald Trump became the first former US President to have their mug shot taken.
