Defendant Oskar Groening waits for the opening of his trial in a courtroom in Lueneburg April 21, 2015. A 93-year-old former bookkeeper at Auschwitz goes on trial in Germany on Tuesday, accused by prosecutors of being an accessory in the murder of 300,000 people, even though he was not involved in any actual killing at the notorious Nazi death camp. The trial of Groening, who was 21 and by his own admission an enthusiastic Nazi when he was sent to Auschwitz in 1942, may turn out to be one of the last big Holocaust trials because so few Nazis suspected of committing crimes during World War Two are still alive.   REUTERS/Ronny Hartmann/Pool   - RTX19LTS
iRonny Hartmann/POOL/Reuters

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