29 April 2011
Last updated at 11:46 ET
Some of the worst damage was in the city of Tuscaloosa, Alabama
President Barack Obama is visiting 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, 210 in Alabama.
Mr Obama is touring Tuscaloosa, Alabama, where a twister thought to be a mile wide ploughed through the city.
He earlier pledged government support for storm-hit communities, with federal aid money being sent to Alabama.
Deaths and widespread devastation have also been reported in Tennessee, Mississippi, Georgia and Virginia.
On Thursday the president hailed rescue workers and said he stood with
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