UK spies face questions about failure to stop 'Jihadi John'
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British spy agencies are facing questions about how a young Londoner who was on their radar as part of terrorist investigations was able to travel to Syria and become the knife-wielding masked militant known as "Jihadi John."
Officials have identified the man shown in hostage-beheading videos as Mohammed Emwazi, a Kuwait-born computer science graduate raised and educated in Britain.
