On this day in history, May 4, 1927, Hawthorne C. Gray made the first balloon flight over 40,000 feet. Gray was a captain in the United States Army Air Corps.
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Today in Engineering History: Unofficial Balloon Altitude Record Set
On this day in history, May 4, 1927, Hawthorne C. Gray made the first balloon flight over 40,000 feet. Gray was a captain in the United States Army Air Corps.
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