JAN WOLFE A U.S. jury convicted a former British citizen for his role in a notorious Islamic State hostage-taking plot that led to the beheading of American journalists and aid workers. After a six-week trial and four hours of deliberations, a federal jury in Alexandria, Virginia, found El Shafee Elsheikh, 33, guilty on charges including lethal hostage-taking and conspiracy to commit murder. In convicting Elsheikh, the jury concluded that he was part of an Islamic State terrorist cell, nicknamed "The Beatles" for their British accents, that beheaded American hostages in Iraq and Syria. Some former hostages, released by the "Beatles"…