Singer Selena Gomez shared on Instagram that she had a kidney transplant due to her struggle with lupus.
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The Vought-Sikorsky VS-300 became the first successful helicopter to fly.
Hindi became the official language of India.
The Ottoman Empire signed the Treaty of Adrianople with Russia, which ended the Russo-Turkish War.
The Luna 2 spacecraft by the Soviet Union became the first human-made artifact to land on the moon's surface.
Pope Paul VI canonized Elizabeth Anne Seton as the first American saint.
