Starting in late 2012, Westerners working in Syria – journalists and aid workers – began disappearing without a trace. A year later the world learned they had been taken hostage by the Islamic State. Throughout 2014, all the Europeans came home, first the Spanish, then the French, then an Italian, a German, and a Dane. In August 2014, the Islamic State began executing the Americans – including journalists James Foley and Steven Sotloff, followed by the British hostages.<BR><BR>Joel...