Film director Spike Lee's long-awaited four-hour documentary about Hurricane Katrina was due to receive its world premiere last night, watched by 16,000 people who lived through the tragedy. The first half of Lee's $2m (£1.05m) documentary, When the Levees Broke: a Requiem in Four Acts, was scheduled to be shown to a sell-out audience in the New Orleans Arena. The venue is next door to the Superdome, the sports complex where more than 15,000 people sought shelter during the hurricane last year.