British Prime Minister David Cameron has vowed to use every means possible to fight jihadism, while refusing to confirm or deny the identity of a notorious Islamic State militant nicknamed "Jihadi John."
Cameron Refuses to ID 'Jihadi John'
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A journalist holds up a newspaper as she does a report outside a London home on February 27, 2015, where Kuwaiti-born computer programmer Mohammed Emwazi, identified by experts and the media as masked Islamic State militant "Jihadi John," is once believed to have lived.
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A masked, black-clad militant, identified by The Washington Post newspaper as a Briton named Mohammed Emwazi, stands next to a man purported to be Steven Sotloff in this still image from a video obtained from SITE Intel Group website, Feb. 26, 2015.