U.N. withholds report on Iran nuclear weapons development & research

From Reuters:

The U.N. nuclear watchdog planned a major report on Iran that might have revealed more of its suspected atomic bomb research, but held off as Tehran's relations with the outside world thawed, sources familiar with the matter said... According to the sources, the International Atomic Energy Agency (IAEA) has apparently dropped the idea of a new report, at least for the time being...

A decision not to go ahead with the new document may raise questions about information that the UN agency has gathered in the last two years on what it calls the "possible military dimensions" (PMD) to Iran's nuclear program...

The sources... suggested the more recent material concerned extra detail about alleged research and experiments that were covered in [a] November 2011 report. A new report would probably have included "updated information on PMD ["possible military dimensions" to Iran's nuclear program] which could have "reinforced the concern" about Iran.

The IAEA's dossier in November 2011 contained a trove of intelligence indicating past activity in Iran which could be used for developing nuclear weapons...

Since then the agency has said it obtained more information that backs up its analysis in the 2011 document, which detailed allegations ranging from explosives testing to research on what experts describe as an atomic bomb trigger.

Other issues it wants Iran to address are alleged detonator development, computer modeling to calculate nuclear explosive yields, and preparatory experimentation that could be useful for any atomic test...

One source said it was believed that the Vienna-based IAEA had received more information on suspicions of nuclear yield calculations, but it was not known to what extent this would have made it into a new report on Iran.

"The agency has obtained more information since November 2011 that has further corroborated the analysis contained in that annex," it said on February 20 in a regular quarterly report on Iran's nuclear program. It has been investigating accusations for several years that Iran may have coordinated efforts to process uranium, test explosives and revamp a missile cone in a way suitable for a nuclear warhead...

The sources said that last year's planned report would probably have amounted to a wider review of the Iranian nuclear file, including PMD [possible military dimensions] and other outstanding issues