Great job! You found yourself some terrific spokespersons for breaking the taboos on PTSD and I think your "interview technique" allowed them to testify in great dignity. One minor (personal) issue for me is where the background music is a little too present (too long) and if not quite distracting (for the narrative remains compelling) still a little superfluous. But this may be suitable for American audiences (I speak as a European).
Look forward to your next film, but I can't imagine there will be one soon, for I can well see all of those hundred hours it takes to make something like this (if not more if we include the research for the great additional inserts found in all sorts of archives, no doubt).