A few days before Hurricane Katrina struck land in New Orleans three years ago Friday, 24-year-old rapper Kimberly Rivers Roberts bought a camcorder for $20 on the street. With her husband Scott, she started filming her neighborsmost of whom didn't have the means to leaveand their preparations to ride out the storm. She kept filming until the levees failed, even as the water rose and her friends sought safety in their attics. Two weeks later, Kim and Scott returned to document the destruction, and join some 20 friends in the back of a truck to begin the long trip to dry land. Kim and Scott's footage, along with archival materials including recovered recordings of 911 calls and video of inmates trapped in the Orleans Parish Prison, makes for a film that is at once journalistic and deeply personal.