obama's agreement with iran, astonishingly provides a protected protocol to enrich iranium. and if you forgive the political in opportunity of the question, do you believe a long-term agreement with iran going forward to allows them to enrich iranian or enrich plutonium is key for the united states? >> i think it is a key question and for the united states but does it provide an assurance against break-out and the development of a bomb by iran? i'm not involved in the negotiation there and so i can't discuss an agreement that hasn't been concluded yet. but that has got to be the underlying principal and i think that is the underlying principal with which the negotiation are being conducted and i associate myself with that deal is better than -- that no deal is better than a bad deal. but for me and my department, we have other obligations associated with this. and one is to continue to deter iran's other detrimental behavior in the region and in the gulf and protect allies and partners there and to protect our important partnership with israel, as a very strong ally and that