The trial of British Isis fighter El Shafee Elsheikh, currently underway in Alexandria, Virginia, is one of the most significant terror trials of the last decade.
The 33-year-old Londoner is charged with involvement in a vast hostage-taking operation during his time with Isis in Syria, which ultimately led to the killing of American journalists James Foley and Steven Sotloff, and aid workers Kayla Mueller and Peter Kassig. The indictment also holds him responsible for the deaths of British aid workers David Haines and Alan Henning.