Best Documentary for a very long time

now I'm not an expert in what happened in Katrina so I can't respond to someone who is saying Spike Lee lied, however this film transcends that and really exposes the problem of race which has been buried except for a few explosions like Ferguson and the beer summit during the Obama administration. The fact is race is a bigger problem then ever before, yes there has been progress in doing away with racism, however as this film makes abundently clear that people should've actually been expecting a disaster like Ferguson VS being surprised by it...........