there in effect as an isis sex slave, helping the leader of isis, mr. baghdadi, to come there, they are treating her as knowledgeable and therefore treating that testimony as credible. >> so disturbing. jim sciutto, thank you so much, we appreciate it. we have more now on isis and the breaking news tonight. new confirmation that the terror group recently launched a chemical attack. our pentagon correspondent barbara starr has been digging on that. >> if isis indeed has a chemical weapon, the big question tonight, where did they get it? the patients came to this northern are iraqi hospital with blistered skin and respiratory distress. the kurds say isis fired mortars at them containing a chemical agent. >> 38 rounds exploded, seven did not. >> reporter: the u.s. is investigating and will test samples to find out if it was mustard agent, a chemical weapon u.s. officials now tell cnn isis