The VS-300 helicopter lifts off the ground on one of its early test flights in Sept. 1939, with inventor Igor I. Skorsky at the controls.
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Thank you to the Mario Family Foundation for enabling the digitization of the U.S. Naval Institute’s Photo Archive. The physical photos in the Photo Archive are stored in the Mildred M. Mario Photo Archive Room located at the U.S. Naval Institute’s Headquarters in Annapolis, MD.

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