I worked with Jews and I have seen their actual numbers on their inner arms. At the end of the war all the medical experimentation and documentation that was done by the Nazis was turned over to the Americans in return they received no punishment. All those doctors lived their life in peace.. So when you sit in airplane think of how many Jews died so that you could fly comfortably. There are thousands of aero and ground pictures of the concentration camps. You ask why there are no negatives?The Nazis were very careful about their work and I am sure all negatives were destroyed. We know this because there are records,just discovered recently, where they counted each individual lice on the heads of the prisoners. Plus, much was destroyed at the end of the war I hope that one day you may visit some of the concentration. camps. You may stand in the middle of the grass and still smell the stench of death and hear the cry of pain. And throw up because you are so sick to your stomach as to what your are seeing.