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(FILES) A file picture taken on October 21, 2014, shows British Prime Minister David Cameron (L) and Home Secretary Theresa May attending a ceremonial welcome in London. David Cameron's announcement that he would not seek a third term sparked heated debate on Tuesday March 24, 2015, over whether he was being laudably honest or had undermined his authority just weeks before an election. AFP PHOTO / TOBY MELVILLE/FILESTOBY MELVILLE/AFP/Getty Images
(FILES) A file picture taken on October 21, 2014, shows British Prime Minister David Cameron (L) and Home Secretary Theresa May attending a ceremonial welcome in London. David Cameron's announcement that he would not seek a third term sparked heated debate on Tuesday March 24, 2015, over whether he was being laudably honest or had undermined his authority just weeks before an election. AFP PHOTO / TOBY MELVILLE/FILESTOBY MELVILLE/AFP/Getty Images

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    Cameron proposes tough anti-extremism measures

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Cameron proposes tough anti-extremism measures

UK PM David Cameron and Home Secretary Theresa May have laid out tough new measures to combat extremism, but do they go too far? CNN's Frederick Pleitgen reports.

Cameron proposes tough anti-extremism measures

UK PM David Cameron and Home Secretary Theresa May have laid out tough new measures to combat extremism, but do they go too far? CNN's Frederick Pleitgen reports.