North Pole conquest claims of Robert Peary and Frederick Cook, Ralph Plaisted's journey, the Plaisted Polar Expedition, is regarded as the first undisputed surface conquest of the North Pole. Affidavits signed by resupply pilots Welland Phipps and Ken Lee confirm that the expedition did not cover any distance by air. See also North Pole References External links Ralph Plaisted at National Archives and Records Administration Anthology of Arctic Reading: United States - What did explorers read? Explorers of the Arctic American polar explorers 1927 births 2008 deaths People from Pine County, Minnesota