John was not only an amazing scientist, he was a great friend, was a brother in physics. We are all deeply saddened.
– I am ailing and malingering; my scientific activity has ended, not without humor John wrote to me recently.
We knew he was sick but hoped he would recover and do much better. John was doing what he loved most — doing physics and traveling. This news plunged us into shock. We shall carry his memory forward and his brilliant ideas. John, you live on in our hearts…