The Atomic Meeting of 1941 in Copenhagen

In the fall of 1941, the scientist Carl Fredrich von Weizsäcker wrote a secret report to Hitler’s army about his and Werner Heisenberg’s visit to Niels Bohr in Nazi occupied Copenhagen: “The technical extraction of energy from uranium fission is not being worked on in Copenhagen….

Obviously, Professor Bohr does not know we are working on these questions; of course, I encouraged him in this belief.”   What Weizsäcker didn’t know (or was lying about) was that Bohr *did* know about their uraniu...