One of the things that often stuns people learning about the Nazis for the first time is the sheer amount of information available to us about them – authored by the Nazis. In this video, we will tell you about five infamous documents detailing the evil of the Nazi regime. One of these documents isn't on paper. Instead, it's on audio tape, recorded in October 1943 in Poznan, Poland. The recording of SS-Reichsfuhrer Heinrich Himmler speaking to an assembled bunch of SS officers is today housed in the US National Archives. We will tell you more about the content of the speech in a few moments.