the regime? plus, bashar al assad's bizarre family history. how the syrian strongman learned to be ruthless and brutal from his father. and is iran's president softening his country's stance on nuclear talks? the tweet that has the u.s. hoping a change is in the works. wolf blitzer's off. i'm joe johns. you are in "the situation room." a graphic, new video that's fueling fears that the syrian rebels may be as brutal and dangerous as the government's forces they're fighting and certainly not helping the obama administration make its case that the opposition is made up of mostly good guys. here's our pentagon correspondent, chris lawrence. hey, chris. >> reporter: hey, joe. it's not our job to tell you how you should react to this video, but you may feel it is very graphic, something that you don't want children to see. we just want to give you that warning now ahead of time and