Stephen Douglas, U.S. politician, died.
The Duke of Windsor (formerly Edward VIII) married Wallis Simpson.
Maj. Edward White became the first U.S. astronaut to walk in space, during the Gemini 4 mission.
The world's worst oil spill occurred when an exploratory oil well, Ixtoc 1, blew out, spilling over 140 million gallons of oil into the Bay of Campeche off the coast of Mexico.
Chinese army troops head to Beijing to crush student-led pro-democracy demonstrations.
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