persian gulf where all or so much of the world's oil supplies pass by boat a choke point, if you will on that waterway and we're told saudi special forces have gone in there as well to take care of that houthi threat. fredricka? >> nic robertson, thank you so much along the border with yemen in saudi arabia appreciate it. the white house is going on the offensive today and trying to sell the nuclear deal with iran to members of congress. everyone from president obama to officials at the state department are calling lawmakers this weekend, trying to make their case as to why this current deal the framework for this deal may be the best option for preventing iran from obtaining a nuclear weapon. i'm joined now by ali reza nar author of "iran after the bomb" and in boston jim walsh, international security analyst and christopher dickey at "the