Scouring the net, I found this article. The US Holocaust memorial Museum is unveiling a photo album of SS officers that were taken at Auschwitz. You can view the complete album on line.
The photos were troubling, not because they depict the horrors of the gas chambers-they don't- but because there is no indication that the subjects are at all disturbed by the inhuman acts that they commit off camera.
There are shots of SS officers calmly lighting trees, clowning around as they go on a field trip and laughing with their female counterparts. Remember all this is done by men who were routinely gassing innocent men, women and children.
The very normalcy depicted in these shots is grotesquely surreal. How can any human engaging in knowing genocide be able to carry on an apparent normal life without having some qualms over their actions. And yet, apparently these people were able to do so.