Open this photo in gallery: A German officer sits next to a 1940 wall calendar. This photo, part of a set of 96 newly discovered pictures that once belonged to a Canadian lawyer, was crucial in determining that they were snapshots of the first mass deportation of prisoners to the Auschwitz Nazi camp on June 14, 1940.Courtesy of Marek Tomaszewski/Handout A calendar on a wall. A large group of men under armed guard. A bath house with a distinct façade. These were all clues that convinced Marek Tomaszewski the photos he had received from Canada were genuine and historically significant....