In his feature-length documentary “The Big Uneasy,” humorist and New Orleans resident Harry Shearer gets the inside story of Hurricane Katrina, a disaster that could have been prevented from the people who were there. Shearer speaks to the tireless investigators and experts who poked through the muck as the water receded, and uncovers a courageous whistle-blower from the Army Corps of Engineers. (Dir. Harry Shearer)