James Meredith became the first African American to graduate from the University of Mississippi.
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President Donald Trump announced that he might want to buy Greenland and claim it for the US.
A mega blackout happened on Java and Bali islands in Indonesia, affecting around 100 million people.
President Woodrow Wilson issued a Proclamation of Neutrality.
Major Gordon Laing became the first non-Muslim to enter Timbuktu.
French astronomer Pierre Janssen first recorded evidence of helium, a then-unknown element.
