You might know Harry Shearer from his numerous film roles, including as the addled Spinal Tap bassist Derek Smalls (“That’s not to say I haven’t had my visionary moments. I’ve taken acid seventy-five, seventy-six times.”). He is also the voice behind many characters on "The Simpsons," including Mr. Burns, Ned Flanders and Scratchy. Shearer also has his own radio program, "Le Show." In The Big Uneasy, his latest role is as a real-life truth teller who investigates the “natural” disaster that was Hurricane Katrina. This documentary, which Shearer directed and stars in, effectively shows us how much of the storm's damage to New Orleans could have been prevented. His affection for the city is outweighed only by his ire at the U.S. Army Corps of Engineers who designed and built a series of levees that were ill conceived from the start and made a bad situation much worse.