Video captured from the scene shows the size of the tornado and the storm gathering momentum as it heads towards Oklahoma City.
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The two-year-old's condition is said to be "life-threatening" after he was struck by a car while out walking with his grandfather in London.
Lord O'Donnell, who used to head up the Civil Service, says he believes Britain may not actually exit the European Union.
The Labour leader said he doesn't believe culture should be just for the elites.