GUESTS: THOMAS POWERS Author of Heisenberg's War: The Secret History of the German Bomb (Knopf, 1993) JEREMY BERNSTEIN Professor Emeritus of Physics at Stevens Institute of Techology in Hoboken, NJ Author of Hitlers Uranium Club: The Secret Recordings at Farm Hall (American Institute of Physics, 1996) Saw nuclear explosions in Nevada the summer 1957 full hour phoner from his home in Aspen,Colorado Werner Heisenberg was Germany's leading physicist during World War II and won the Nobel Prize in 1932 for his work on quantum mechanics. He also headed up Nazi Germany's nuclear research program. Heisenberg maintained until his death that there was never a danger of a German atomic bomb because he and his fellow scientists never were interested in building such a weapon. Heisenberg's detractors say Germany's failure to develop a bomb was because of scientific shortcomings rather than any moral decision on Heisenberg's part. More than fifty years later, questions still remain about what Heisenberg was up to during the war.