RAdm. Richard E. Byrd aboard an R4D while on his 1947 flight over the South Pole, part of Operation High Jump.
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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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