Washington also indicated it had not changed its view that Iran was not yet on the verge of building a nuclear bomb, despite Israeli Defense Minister Ehud Barak's statement that US intelligence now viewed the threat as more "urgent."
The latest signs of differing public stances from the United States and its ally on Iran came on a day when speculation ran rampant in the Israeli press about a possible strike against Iran's nuclear installations within months.
White House spokesman Jay Carney declined to comment on intelligence matters but said that Washington and Israel were agreed about Iran's ambitions for its nuclear program.
"I would also say that we have eyes - we have visibility into the program, and we would know if and when Iran made what's called a breakout move towards acquiring a weapon."
Breakout capability is commonly understood to be the point when a state acquires the knowledge, capability and materials to build a nuclear bomb if it wants to.
Carney said later in his briefing that he was referring to International Atomic Energy Agency officials mandated to inspect Iran's nuclear sites because Tehran is a signatory to the Nuclear Non-Proliferation Treaty (NPT).
But many experts believe there has also been substantial infiltration and sabotage of Iran's nuclear program by Western and Israeli intelligence agencies.
Military sites in Iran that do not have confirmed nuclear activities are off-limits to inspectors unless provided for by agreement.
Though the Obama administration has not taken the military option off the table, Carney said "there is time and space to pursue the diplomatic option that includes extremely and increasingly aggressive sanctions."
National Security Council spokesman Tommy Vietor meanwhile said that Washington continued "to assess that Iran is not on the verge of achieving a nuclear weapon."
US officials have declined to comment directly on Barak's remarks following a prolonged period of uneasy interaction between the Obama White House and Prime Minister Benjamin Netanyahu's government.
But Carney's comments appeared to be an indirect repudiation of Barak's comment on Israeli Public Radio that it was getting tougher to assess Iran's nuclear progress.
Barak also said the latest advances in Iran's nuclear program were making it difficult to say if it could be stopped "in time" - a statement Carney's comment on Friday seemed to directly contradict.
The Israeli defense minister also said Thursday that a recent US intelligence report made the Iranian issue more "urgent" and had moved the US administration closer to the Israeli position.
The US perception of the exact moment that Tehran's program constitutes an unacceptable threat differs from that of Israel.
Washington's statements repeatedly refer to the need to stop Iran acquiring a "nuclear weapon."
Israel, however, believes that Iran should be stripped of the "capability" to make nuclear weapons, including the capacity to enrich uranium and to have nuclear triggers that cause a fissile reaction.
The moment at which Israel's red lines are crossed in theory is earlier than that of Washington's - hence the gap between the public statements of US and Israeli officials.
A series of visits by high-ranking US defense officials to Israel has raised speculation that Washington is trying to dissuade Israel from a preemptive military attack.
COMMENTS (11)
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Israeli polls show that they want something done about Iran, but they want US soldiers to do it and not their own children to die in order to make Israel more secure.
So not only do Jews screw our economy by their greed and machinations in Wall Street, we have to bail them out with billions of dollars and send our kids to die for them....Since when is our country a vassal of the Jewish Zionist state of Israel?
@Cautious: Why US is silent on nuclear program of Israel? Why US has weapons of mass destruction? Why US is killing innocent people in Iraq and Afghanistan? Why US is silent on illegal occupation of Palestine by Israel?
@Cautious: And what about the US' mass destruction weapons which have been used against the handful Taliban and mostly innocent muslims in Afghanistan by US' attack on Afghanistan after 9/11 and as the consequence of innocent muslims' killings the terrorism spread in the world especially in Afghanistan and Pakistan???? And most especially importantly US' officials couldn't prove it till now that Iran is making nuclear weapons on large or small scale.......
@praveen: You are right but only in the some countries' leaders views/sights especially Pakistani and mostly in the muslim countries' people views/sights US leaders are seen hatefully and with hatred feelings just due to dual-faced,double standard,prejudicial and hypocritical policies the most especially importantly about/for the muslims and the muslim countries.....
@Jibran Khan
Yeah -- the chanting "death to America" for 30+ years, history of using terrorist against America and violating the UN treaty against building nukes has nothing to do with it.
US is against Iran as Iran is only Muslim country that is supporting Hizb Ullah against the Israel. Other Arab countries are puppets of US and West. US and Arab countries are silent on nuclear program of Israel. We salute Iran for showing resistance against the US and Zionists.
@Parveen People like the money of the US, they dont like the polices of the US. If they had an alternative they'd ditch the US in a heartbeat
Iran's nuclear threat might as well be a hypothetical one. Yet cloak-and-dagger operations involving assassinations of Iranian nuclear scientists on the one side and bomb attacks on innocent holiday-makers and diplomats from Israel on the other side are real. When will this nuclear dispute be resolved is not clear.
@Ahmer Ali USA is the most loved country in the world, go and watch the line infront of US consulate for visa in Karachi. Its beat hands down , your father country soudia.
And what about the mass destruction nuclear and chemicals weapons you have??? This is one of the reason amongst the reasons of creating hatred about/for USA in the world......