Claus Helberg (31 January 1919 – 6 March 2003) was a Norwegian resistance fighter and mountain guide,  was a member of Company Linge, a resistance commando unit that was best known for carrying out, during World War II, which titled series of operations undertaken by Norwegian saboteurs during World War II to prevent the German nuclear weapon project from acquiring heavy water (deuterium oxide), which could have been used by the Germans to produce nuclear weapons?
Claus Helberg Claus Helberg (31 January 1919 – 6 March 2003) was a Norwegian resistance fighter and mountain guide. He was a member of Company Linge, a resistance commando unit that was best known for carrying out Norwegian heavy water sabotage during World War II. After the war, he worked for the Norwegian Mountain Touring Association until his retirement in 1982. While volunteering with the Association after his retirement, he helped guide several members of the Scandinavian royalty. According to the "New York Times", "[he was] the favorite mountain guide of Scandinavian royalty..." These clients included Queen Sonja and Queen Margrethe.
National Royalist Movement The National Royalist Movement (French: "Mouvement national royaliste" or MNR, Dutch: "Nationale Koningsgezinde Beweging" , NKB) was a group within the Belgian Resistance in German-occupied Belgium during World War II. It was active chiefly in Brussels and Flanders and was the most politically right-wing of the major Belgian resistance groups.