Richard Evelyn Byrd Jr. (October 25, 1888 – March 11, 1957) was an American naval officer, and pioneering 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.
Byrd claimed to be the first to reach both the North and South Poles by air. However, there is some controversy as to whether he was actually the first person to reach the North Pole. It is generally believed that the distance he claimed to have flown was longer than the possible fuel range of his airplane.
He was a recipient of the Medal of Honor, the United States Armed Forces' highest military decoration, and the Navy Cross, the second highest honor for valor given by the U.S. Navy.