The white house has confirmed that an iranian attack on israel is a real and viable threat. National Security Communications adviserjohn kirby has told reporters that the danger was credible and the white house was watching very, very closely. Earlier, a us official told our broadcast partner cbs that strikes could start as early as today although nothing is certain and other outcomes are possible. Iran has been threatening reprisals, for the israeli strike on its consulate in syria, nearly two weeks ago. For its part, israel is threatening to hit back hard if it is subjected to a direct attack by iran. French citizens are being asked not to travel to iran, lebanon, israel and the palestinian territories. The United States has told diplomatic staff and their families, not to travel outside three cities. The uk has also warned against travelling to israel, as has india. Just a moment we will be live in jerusalem and in washington to talk to our correspondence there. First david martin i