"The World Must Know" documents the compelling human stories of the Holocaust as told in the renowned permanent exhibition of the United States Holocaust Memorial Museum in Washington, D.C. Drawing on the museum's extensive collection of artifacts, archives, and eyewitness testimonies, and augmented with more than two hundred period photographs, this book serves as an enduring reminder of the moral obligations of societies and individuals. This second edition is enhanced with new insights and updates based on archival information that had been inaccessible to researchers until after the collapse of the Soviet Union and the Communist regimes of Eastern and Central Europe. It includes new photographs, redrawn charts, a new section on the Holocaust in Greece, an updated bibliography, and a new foreword by the museum director.