Hans Joachim Sewering was a German doctor whose wartime activities under the Nazis provoked much controversy in later years. He was born in Bochum in 1916, the son of a coal miner, and studied in Munich and Vienna from 1934 to 1941. He joined the SS in 1933, the year of Hitler’s takeover, and the following year joined the Nazi party. He later claimed, like many others, that he was taken in by propaganda. Many of his colleagues did join the Nazi party but did not get involved in the euthanasia programme, which aimed at the elimination of unwertes Leben [worthless life]. After the war, prosecutors had determined that Sewering had been a middle-ranking Nazi officer, and he was fined. From 1947 he had his own practice in Dachau. In 1992, Sewering was designated chairman of the World Medical Association but withdrew the following January because of accusations about his wartime role. Sewering repeatedly denied the allegations but in 1994 the US Department of Justice confirmed that it had placed him on its immigration “watch list”, barring him from entering the country.