Nazi Germany had a head start in the science and technologies that dramatically transformed armed conflict in the twentieth century, leading to ultimate weapons of mass destruction, and the means of delivering them, ballistic missiles. John Cornwell's powerful history tells the story of Germany's scientists, from Hitler's rise to power in 1933 to his fall in 1945. He describes the behaviour of researchers in the huge span of scientific disciplines in which Germany excelled and led the world. Some were Nazi enthusiasts, many more were fellow travellers.