Kassig would be the fifth Western hostage killed by ISIS, in less than three months, and the third American. Previous Western beheading victims were American journalists James Foley and Steven Sotloff, as well as Britons David Haines, a former Royal Air Force engineer, and Alan Henning, a taxi driver from northwest England. The group is also holding British photojournalist John Cantlie, who has appeared in several other videos released by the group functioning as a de facto spokesman