The Vought-Sikorsky VS-300 became the first successful helicopter to fly.
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14-year-old Ahmed Mohamed was arrested at school after bringing in a homemade clock, which was mistaken for a bomb.
Mary Ann Fischer gave birth to quintuplets, who became the first US quintuplets to survive past infancy.
Singer Selena Gomez shared on Instagram that she had a kidney transplant due to her struggle with lupus.
The Ottoman Empire signed the Treaty of Adrianople with Russia, which ended the Russo-Turkish War.
Hindi became the official language of India.
