Rudolf Peierls

SIR: Claire Bruyère (Letters, 7 August) blames me for omitting to mention, in my review of Freeman Dyson’s book the Vietnam War or Dyson’s participation in JASON. I was not trying to sit in judgment on Dyson, I was only reviewing his book. More seriously, she blames Dyson for belonging to JASON, and quotes, with evident disapproval, his justification for continuing discussions with people holding...

When I first heard of a book which claimed that Niels Bohr, Enrico Fermi, Leo Szilard and Robert Oppenheimer were Soviet spies, my first reaction was to ignore this as inherently improbable. However, after the experience of finding that Klaus Fuchs, a colleague and collaborator, and, I thought, my friend, was a Soviet spy, I could no longer regard anything as impossible. So one had to look at these...