Hurricane Katrina: What Bush Knew

"Video showing President George W Bush being warned on the eve of Hurricane Katrina that New Orleans' flood defences could be overcome has emerged. The footage, obtained by the Associated Press, also shows Mr Bush being told of the risk to evacuees in the Superdome. It appears to contradict Mr Bush's statement four days after Katrina hit, when he said: 'I don't think anyone anticipated the breach of the levees.' Critics say more could have been done sooner to evacuate the city."