Theodore Roosevelt became the US president after former president William McKinley died from gunshot wounds.
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The IBM 305 RAMAC commercial computer was announced to the public.
Singer Selena Gomez shared on Instagram that she had a kidney transplant due to her struggle with lupus.
The Vought-Sikorsky VS-300 became the first successful helicopter to fly.
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.
