New York Mayor Michael Bloomberg and the city's police commissioner Ray Kelly are speaking in response to claims the Boston Marathon bombing suspects planned to detonate bombs in Times Square.
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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.
Rain will spread into southern and central England but elsewhere will remain dry with warm sunny spells.