Harold Irving June (1895–1962) was a machinist, an aviator, a test pilot, and an explorer in Antarctica. He is best known for his 1928–1930 service in the first Antarctic expedition of Admiral Richard E. Byrd. Sitting in the co-pilot's seat with supplemental radio duties, he flew with Byrd, pilot Bernt Balchen, and photographer Ashley McKinley over the South Pole on November 29, 1929.

Richard Evelyn Byrd Jr., an American naval officer, was a pioneering American aviator, polar explorer, and organizer of polar logistics. Aircraft flights in which he served as a navigator and expedition leader crossed the Atlantic Ocean, a segment of the Arctic Ocean, and a segment of the Antarctic Plateau. He is also known for discovering Mount Sidley, the largest dormant volcano in Antarctica.