'Time is not infinite' for Iran to give up nuclear ambitions, White House says

White House Press Secretary Jay Carney said on Monday that "time is not infinite" for Iran to prove it will give up its nuclear weapons ambitions, as the U.S. and other world powers head to talks with Iran over its program later this week.

The New York Times reported the Obama administration and its European allies are planning to demand the closing and ultimate dismantling of Fordo enrichment plant, the recently completed nuclear facility built deep under a mountain considered more protected against air strikes.

Dealing with Iran's production of uranium enriched by 20 percent is a priority for the U.S. and the international community, Carney said, but stressed "our bottom line" is Tehran's verifiable decision to abandon nuclear ambitions and fully stop uranium enrichment in the country.

Carney wouldn't provide a time frame for when all this must happen, other than to say the "window is closing," and "time is not infinite here."

"But there is enough time and enough space at this moment to pursue a diplomatic solution - that’s why the resumption of these talks is important," he said.