Please turn on JavaScript. Media requires JavaScript to play.Tornado video - first clip courtesy Chris England/Crimson Tide Productions
President Barack Obama is to visit storm-ravaged communities in Alabama as south-eastern US states face up to the aftermath of devastating storms.
At least 297 people are known to have died from tornadoes that ripped through a swathe of states, 204 in Alabama.
Mr Obama will visit Tuscaloosa, Alabama, where a twister thought to be a mile wide ploughed through the city.
