Spelling error partly responsible for Boston Marathon killings

The Russians knew he was dangerous. They warned the US authorities that Tamerlan Tsarnaev was a radical and violent man. But he slipped through the cracks of customs in his frequent journeys before the Boston Marathon bombings due to a misspelling of his name. Robert Spencer gives the full story. http://www.jihadwatch.org/2014/03/russia-warned-u-s-about-tsarnaev-but-spelling-error-let-him-escape