Al-Qaeda Threatens U.S.: ‘Gravest Consequences’ if Boston Bomber Is Executed

Al-Qaeda leader Ayman al-Zawahiri has released a video message warning the United States that it will face the “gravest consequences” if Boston Marathon bomber Dzhokhar Tsarnaev is executed. Tsarnaev, 21, was sentenced to death by lethal injection last year. In fact, Zawahiri ordered the U.S. to avoid executing any Muslim prisoners. More...