West Virginia had its hottest day on record at a sweltering 112°F (44°C).
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A chemical factory in Seveso, near Milan, Italy, exploded, covering surrounding areas in dioxin.
The Scopes Monkey Trial took place in Dayton, Tennessee.
Martin Luther King Jr. was arrested for a demonstration he was involved in during December 1961.
Nazi forces moved on Britain for the first time after attacking shipping containers in the English Channel.
Erden Eruç began the world's first successful solo human-powered circumnavigation of the world.
