The unbelievable true story the first mass-shootings in America, and a documentary made with so much attention that it is almost impossible to forget. The animations might put you off if you watch the trailer, but they are what makes this movie so amazing. Added to old tapes and current statements from survivors and heroes, they perfectly fill the gaps in the enactment of what happened. An equally sad, gripping and incredibly well-made work on an event that happened 50 years ago and to which there are still no solutions.