It's the second internet-posted beheading of a US journalist in less than a month. As with James Foley, Steven Sotloff's gruesome murder was accompanied by the same message of defiance aimed squarely at the US, forcing President Barack Obama into a war he thought he left behind for good in 2011. François Picard and his panel discuss what's next for Washington.
Programme prepared and produced by François Picard, Anelise Borges, Dheepthika Laurent and Chris Davis.
Douglas A. Ollivant
Senior national security fellow with the New America Foundation
Chairman of Idaho Republican Party
Former French Defence Ministry official
International war correspondent, Le Nouvel Observateur