On the afternoon of 15 April 1945, British troops liberated the Bergen-Belsen concentration camp in northern Germany. They were met with scenes of unimaginable horror. Some 13,000 dead bodies were slowly decomposing in the spring sun while another 60,000 gaunt figures were alive but emaciated, sick and starving, teetering on the precipice of death. In the days after the British arrival, the prisoners continued to perish at a rate of 500 a day, most...