How two extremists capable of such a gruesome attack were able to slip the net is just one of the questions facing British intelligence services. But now, as Charlie D'Agata reports, there's an ... more 
How two extremists capable of such a gruesome attack were able to slip the net is just one of the questions facing British intelligence services. But now, as Charlie D'Agata reports, there's an astonishing claim that agents actually tried to recruit one of the men six months ago. less 
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Sat, May 25, 2013 9:33 AM EDT