Whose expedition first reached the North Pole?

The American explorer Robert Peary, accompanied by Matthew Henson and four Inuit men, claimed to have reached the North Pole on 6 April 1909. Their claim was long accepted but has since been questioned because of gaps in their navigation records. A rival explorer, Frederick Cook, claimed to have reached the pole a year earlier, but his claim is generally dismissed. The first undisputed surface journey to the pole came decades later. The first verified sighting of the pole was made from the air by an airship expedition in 1926.