In the spring of 1945, at a couple of days' notice, 98 medical students were taken from the sheltered world of their teaching hospitals and flown to Belsen, to give what help they could to the thousands of starving and disease-ridden inmates. In the weeks that followed, these volunteers witnessed scenes of nightmare and horror as they struggled to care for people who were physically beyond saving or had lost all will to live. On the 40th anniversary of their visit, and after a lifetime in medicine, some of these men look back and reflect on the meaning of that experience.