The Nazi Plan is a 1945 American documentary film directed by George Stevens. The film, compiled from extensive footage of captured Nazi propaganda and newsreel image and sound recordings, was produced and presented as evidence at the Nuremberg Trials for Hermann Gring and twenty other Nazi leaders.
In the course of this work, Budd Schulberg apprehended Leni Riefenstahl at her country home in Kitzbhl, Austria, as a material witness, and took her to the Nuremberg editing room, so she could help Budd identify Nazi figures in her films and in other German film material his unit had captured. Stuart Schulberg also took possession of the photo archive of Heinrich Hoffmann, Hitlers personal photographer, and became the film units expert on still photo evidence. Most of the stills presented at the trial carry his affidavit of authenticity.The films central footage and themes relied heavily on the work of German film maker Leni Riefenstahl, in particular the 1935 movie Triumph des Willens Triumph of the Will. ........
Source: Wikipedia