From HSToday:

The suspected involvement of a British and French jihadist in another barbaric video of an American beheaded at the hands of the Islamic State of Iraq and the Levant (IS) attests not only to the brutality of IS terrorists, but also heightens fears over the possibility of Western jihadists traveling back home to conduct lone wolf attacks. The White House confirmed Sunday the death of Peter Kassig — an American aid worker and former US Army Ranger — who is believed to be the victim in the latest beheading video circulated by IS. While doing humanitarian work in war-torn Syria, Kassig was taken captive and held hostage for over a year.