In 1948, the High Latitude Air Expedition North-2 was created. Participants of this expedition, as part of the flight crew, landed on the surface to conduct various observations. One of the teams, consisting of Pavel Gordienko, Pavel Senko, Mikhail Somov and Mikhail Ostrekin, was delivered by plane on April 23, 1948, directly to the point with coordinates of 90°N. Then the same plane took them back as the first people in the world to have visited the North Pole with absolute certainty.