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Cover top: Norges Hjemmefrontmuseum; bottom: Norsk Hydro/Norsk Industriarbeidermuseum; xxii: Rainer Lesniewski/Shutterstock; 4: ullstein bild via Getty Images; 8: National Archives of Norway via Flickr; 10: Haukelid Family Collection; 13,14: Norges Hjemmefrontmuseum; 16: Schrøder/Sverresborg Trøndelag Folkemuseum; 18: Norges Hjemmefrontmuseum; 20: Hardanger Folkemuseum; 21: Friedrich Saurer/Science Source; 22: Norsk Hydro/Norsk Industriarbeidermuseum; 23: Norges Hjemmefrontmuseum; 25: Heinrich Pniok www.pse-mendelejew.de; 27: AIP Emilio Segre Visual Archives; 28: Peter Hermes Furian/Shutterstock; 30: US National Archives and Records Administration, courtesy AIP Emilio Segre Visual Archives; 31: Sueddeutsche Zeitung Photo/Alamy; 37: J. A. Hampton/Topical Press Agency/Getty Images; 39: LAPI/Roger Viollet/Getty Images; 42: US National Archives and Records Administration; 44-45,47: Norges Hjemmefrontmuseum; 49: The Longum Collection/Norsk Industriarbeidermuseum; 51: Norges Hjemmefrontmuseum; 54: Skinnarland Family Collection; 57: Norges Hjemmefrontmuseum; 58: Erich Lessing/Art Resource, NY; 60: dpa/picture-alliance/AP Images; 65: Keystone-France/Gamma-Keystone via Getty Images; 68,69,71,73,76,80,83: Norges Hjemmefrontmuseum; 86: courtesy of Tun Abdul Razak Research Centre, Brickendonbury, Hertford, UK; 92: Freia Beer/Orkla Industrimuseum; 98-99: Charles E. Brown/Royal Air Force Museum/Getty Images; 100: Signals Collection ’40-’45, www.SignalsCollection.nl; 108,110,111,112: Norges Hjemmefrontmuseum; 114: Haukelid Family Collection; 115: The Longum Collection/Norsk Industriarbeidermuseum; 117: Photograph by Samuel Goudsmit, courtesy AIP Emilio Segre Visual Archives, Goudsmit Collection; 121: Lex Peverelli; 129: Eric Chretien/Gamma-Rapho via Getty Images; 134,136: Norges Hjemmefrontmuseum; 139: Haukelid Family Collection; 148-149,152: Norges Hjemmefrontmuseum; 154: Hero Film/Ronald Grant Archive/Alamy; 158,161: Norsk HYDRO/Norsk Industriarbeidermuseum; 170: Norsk Industriarbeidermuseum; 172: Norges Hjemmefrontmuseum; 186: Corbis; 198: AIP Emilio Segre Visual Archives; 200-201,204: Norges Hjemmefrontmuseum; 206,207: Courtesy of 100th Bomb Group www.100thbg.com; 208-209: Norges Hjemmefrontmuseum; 212: The Frognes collection/Norsk Industriarbeidermuseum; 214: Norges Hjemmefrontmuseum; 216: AIP Emilio Segre Visual Archives; 224: Haukelid Family Collection; 228: Norges Hjemmefrontmuseum; 230: Private collection/Norsk Industriarbeidermuseum; 237,240-241: Anders Beer Wilse, Norsk Folkemuseum; 242: Jürgen Sorges/AKG Images; 248-249: AP Photo; 251 top: Norges Hjemmefrontmuseum; 251 bottom: O. H. Skinnarland Family Photo; 252,254; Norges Hjemmefrontmuseum; 256-257: Jürgen Sorges /AKG Images.