"I have told our European friends who are handling the negotiations on behalf of the rest of the world that we want to help make sure the process goes forward, and we're looking at ways to help move the process forward," Bush said, noting talks he had during last week's trip to Europe.

"I am most appreciative that our friends in Europe agree with the United States that Iran should not have a nuclear weapon," he said, underlining his view on Iran and nuclear weapons with the words, "Period. No ands, ifs or buts."

"And, by the way, Mr. (Russian President Vladimir) Putin feels the same way. And to me that is a very positive start for achieving our common objective," Bush added.

"The guilty party is Iran. They're the ones who are not living up to international accords. They're the people that the whole world is saying: 'Don't develop a weapon.'

"And so we are working with our friends to make sure, not only the world hears that, but that the negotiating strategy achieves the objective of pointing out where guilt needs to be, as well as achieving the objective of no nuclear weapon," Bush said.

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