If you do not watch documentaries, watch this and you will be converted. The slow release onto the celluloid is mesmerising and compelling: it just keeps getting better and better.
No padding, no dodgy dialogue, no script boobs; just an incredible story packed into a relatively short period of screen-time. It feels as though every image, every frame has been chosen specifically to drive the story.
Basically, this film sucks you in, grabs you by the neck and delivers such a painful sucker-punch that it leaves you shaking, quite literally.
Buy it, watch it and wonder how the hell someone let the mess in 1972 ever happen.