As I write the Republican National Convention is breathing a sigh of relief that Gustav achieved so much for it: It made the unpopular president’s appearance come via satellite (doesn’t he have a jet?) and did no substantial damage thus only tacitly reminding the country of Katrina and the failures of the government’s response. But in the new documentary Trouble the Water we are reminded in a way that does not tell only how bad it was, it shows us in the most graphic way. The home-made video is by New Orleans native Kimberly Rivers Roberts aka Black Kold Madina and the movie goes on to tell her story as it does the story of New Orleans and the crisis that was created by all those failures. Within the wave of documentaries in the last few years “Trouble the water” stands tall for getting the strength of the story to pull us along in ways that push viewers to feel at once hopeful and enraged, leading not to a sense of dread but to action.