Ellen Nakashima reports:
An Oregon man convicted last year of attempted terrorism filed a motion Monday that paves the way for the first constitutional challenge by a criminal defendant to a warrantless surveillance program operated by the National Security Agency.
Mohamed Osman Mohamud, 22, was found guilty of attempting to use a weapon of mass destruction after he was caught in an FBI sting operation trying to detonate what turned out to be a fake bomb at a Christmas tree lighting ceremony in 2010.
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