One of the most daring clandestine operations of World War II was the 1944 sinking of the Norwegian ferry Hydro with its cargo of "heavy water" destined for the Nazis' secret atomic bomb project.
Note: This program airs on PBS May 30, 2006. This site offers an audio interview, the T.V. program description, Links & Books, a Teacher's Guide, the program transcript, and the program credits.