really do. i m wolf blitzer. you re in the situation room. captions by vitac www.vitac.com we re following new developments in the alleged iranian terror plot to assassinate the saudi ambassador to the united states. among the latest, the u.s. has slapped sanctions on an iranian airline it says provided materials support for the plot. in tehran, the foreign ministry is protesting the allegations to a swiss diplomat in tehran. switzerland represents the two countrie countries. saudi officials are blasting iran over the plot. prince turkey, the former saudi intelligence chief, the former chief in washington warning, i m quoting, someone in iran is going to have to pay the price. we re also digging deeper into the american citizen charged in the case. lisa siylvester has been investigating. the 56-year-old is the man investigators say is at the center of this plot and authorities are describing him as ruthless, unconcerned about killing innocent people, but his closest