The greatest conflict in human history, not surprisingly, spawned the most extensive intelligence efforts by the participants. World War II was also witness to some of the greatest intelligence failures.
World War II changed the practice of science dramatically, and work of scientists during the conflict brought about fundamental technological changes that shaped the postwar world.
With the discovery of fission in 1939, it became clear to scientists that certain radioactive materials could be used to make a bomb of unprecented power...
