By Adam Jones, Ph.D. (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. https://commons.wikimedia.org/wiki/File%3AShoes_of_Victims_from_Operation_Reinhard_Death_Camps_-_Collected_at_Majdanek_Concentration_Camp_-_Lublin_-_Poland.jpg