The Vought-Sikorsky VS-300 became the first successful helicopter to fly.
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The IBM 305 RAMAC commercial computer was announced to the public.
The Ottoman Empire signed the Treaty of Adrianople with Russia, which ended the Russo-Turkish War.
Pope Paul VI canonized Elizabeth Anne Seton as the first American saint.
Theodore Roosevelt became the US president after former president William McKinley died from gunshot wounds.
Britain skipped 11 days of the Calendar from September 3 to September 13, with the adoption of the Gregorian calendar starting on this day.
