On Bret Baier's show it was brought up that an ISIS laptop computer they found a 19 page document on biological weapons and an Islamic ruling on the use of WMD.
"If Muslims cannot defeat the Kafir (unbelievers) in a different way, it is permissible to use WMD, even if it kills all of them and wipes them and their descendents off the face of the earth".
ISIS had offered to swap James Foley for the release of Pakistani scientist, Aafia Siddiqui, who is in a Texas prison for Terrorism after planning a mass casualty attack in Afghanistan, while working for al Qaeda. She is a neuroscientist that went to M.I.T. and earned her PhD from Brandeis University in MA.