Rage in the heart of islamabad as tens of thousands of opposition protesters call for the resignation of the Prime Minister. Islamic state militants posted a graphic video online showing the beheading of american journalist james foley. Hes been missing since he was seized in syria back in november 2012. The militants say it is retribution for the recent u. S. Air strikes in iraq. U. S. Officials say theyre trying to establish the authenticity of the video. Andy more head has this report. Reporter he was a journalist drawn to war reporting. Previously in libya, he was captured and held by militants for 14 days. I was hit several times with an ak47, punched and dragged into a vehicle with my hands tied behind my back. Reporter on a facebook site campaigning for his freedom, james foleys mother seemed to accept her son was dead. She urged his kidnappers to spare the lives of the remaining hostages. The militants say theyre taking revenge for recent american air strikes on islamic fighter