I really didn't want to get into this, but here are just a couple of quick (hopefully) accurate factoids:
All Germans had to be evaluated after the war so that they could be "de-Nazified" and they were categorized from 1 (Nazi) to 5 (totally innocent). Reifenstahl was found to be a 4. I can't remember where I read that, but wikipedia says it as well.
The Great Depression was already over by 1939, though job levels didn't return to 1929 levels until 1941 (before Pearl Harbor). (I just confirmed this on wikipedia too.)
The goal of the photographers of FSA (and RA) was to present the plight of the small farmer so as to save them, and they needed all the help they could get. Though I will admit that "some" could certainly call it propaganda for Communism "some" also think the Earth is 6000 years old and call themselves "scientists".
I far prefer "Native Land" to "Triumph of the Will" (OK that's not really a factoid though it is true)
I "wish" I could stop using quotes.