The diplomat said that the Iranians have paved over a large part of the area surrounding a building where the IAEA suspects the Iranians were conducting nuclear experiments.

CNN: Story highlights

The U.S. believes sub-critical experiments are permitted but hydro-nuclear tests are not.

CENTERFORSECURITYPOLICY: Center for Security Policy | Politics and the Test Ban Treaty, By George F. Will, Newsweek, 20 October 1999

That is, the assessments must be grounded on existing nuclear test data, nonnuclear tests, fundamental science experiments, and simulations using validated computer models.

CENTERFORSECURITYPOLICY: US Nuclear Stockpile

"A more complete picture of today's observations will emerge later this year after the LHC provides the experiments with more data, " the nuclear research organization, known as CERN, said in its statement.

CNN: STORY HIGHLIGHTS

If I understand the tetraploid complementation technique utilized in these experiments correctly, then, scientists would no longer need to generate embryos via somatic cell nuclear transfer (cloning).

FORBES: The Line Between Embryonic And Pluripotent Stem Cell Research Is Blurring