Two U.S. men charged with beheading plot to help Islamic State

By Richard Valdmanis BOSTON (Reuters) - Prosecutors charged two U.S. men on Friday of plotting to help the Islamic State militant group by beheading Americans, after an investigation that led law enforcement officers to shoot a suspect dead last week in Boston. The case follows a handful of so-called "lone wolf" attacks in the United States and Canada since last year by people whom authorities said were inspired by Islamist State, which controls parts of Syria and Iraq and has vowed attacks on t