After some researching i found some usable information on the story behind the Telemark Operations. Here's the full story taken from http://www.reference.com/browse/wiki/Norwegian_heavy_water_sabotage "Operations Freshman and Grouse Destruction of the plant was mounted by the Combined Operations command in November 1942 . The plan consisted of two operations: the first would drop a number of Norwegian locals into the area as an advance force, and once in place a party of British engineers would be landed by glider to attack the plant itself. On 19 October 1942 , a four man team of Special Operations Executive (SOE) trained Norwegian commandos parachuted into Norway. From their drop point in the wilderness they had to ski a long distance to the plant, so considerable time was given to complete this part of the mission, known as Operation Grouse . This plan, unlike those which did not succeed before, included the team studying and memorising blueprints. Once the Norwegian ...