If you think that you understand the scope of the German atrocities committed during WWII, even if you have been to the Holocaust Museum, unless you have seen this film, you likely do not. With footage much of which had not seen publicly before this 2014 documentary, this film chronicles the liberation of prison and death camps as filmed by British, American, and Soviet army photographers, as well as the healing of the survivors after liberation, and the prosecution of those who managed the death camp industry. The title comes from the narration, "Unless the world learns the lesson these pictures teach, night will fall. But by God's grace, we who live will learn." A must-see film to understand the catastrophic consequences that hate and bigotry can bring.