for the next debate, does cain have what takes to go the distance? we want to welcome our viewers in the united states and around the world. i m wolf blitzer and you re in the situation room. . president obama says that iran must be held accountable for an alleged plot to kill a saudi ambassador to the united states. he is ramping up efforts to punish and isolate iran as he puts pressure on republicans in congress for blocking his jobs bill. jess yak jessica yellin is standing by much he was asked about the alleged assassination plots, the links to the iranian government. give us the headlines. well, the president repeatedly declined to say that nation s supreme leader and president were aware of the alleged plot. but he insisted that knowledge of it reached high into the iranian government. here s the president. we believe that if even if at the highest levels there was not detailed operational knowledge, there has to be accountability with respect to anybody in