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28 February - Operation
Gunnerside: Six Norwegians led by Joachim Ronneberg
successfully attack the heavy water plant at Vemork.
24 July - An allied air raid completely destroys the Aluminium and Magnesium plants in Herøya being built by Norsk Hydro in
cooperation with Luftwaffe-operated Nordische Aluminium
Aktiengesellschaft (Nordag). 55 construction workers are
killed.