 The plant was known to be producing heavy water, and although the scientist and organiser of the sabotage, Leif Tronstad, had not been aware of the connection between heavy water and atomic weaponry early in the war, it eventually became clear that Germany could be using the heavy water for a nuclear energy project.Haugland was parachuted over Hardangervidda on 18 October 1942 together with Arne Kjelstrup, Jens-Anton Poulsson and Claus Helberg.Their codename was Operation "Grouse", and their first mission was to await the British Operation "Freshman".