Iran gains in nuclear technology....

And, just what the US going to do?

Iran is poised to make a significant leap in its ability to enrich uranium, with more sophisticated centrifuge technology that is being assembled in secret to advance the country's nuclear efforts, according to U.S. and European intelligence officials and diplomats.

Iran's apparent gains in centrifuge technology have heightened concerns that the government is working clandestinely on a uranium-enrichment plant capable of producing more nuclear fuel at a much faster pace, the officials said.

U.N. nuclear monitors have not been allowed to examine the new centrifuge, which Iranian officials briefly put on display at a news conference last month. But an expert group's analysis of the machine -- based on photos -- suggests that it could be up to five times as productive as the balky centrifuges Iran currently uses to enrich uranium.