Despite those and other obstacles, negotiators appear increasingly likely to clinch an historic deal to restrict Iran's nuclear program for at least a decade in exchange for relief from sanctions, Western and Iranian officials said.
Richard Nephew challenges the argument that Iran will "plow its hard-won sanctions relief into regional adventurism", arguing that Iran has far more significant domestic problems to address at the moment and that any diversion could be easily countered by U.S. and its allies in the region.
Iran's envoy to the U.N. nuclear agency declined on Thursday to commit to nuclear transparency measures that were part of a preliminary deal Tehran and world powers reached in April, deflecting U.S. demands to implement such provisions.
The Israeli military sees potential security benefits in an expected international deal curbing Iran's nuclear program, a senior officer was quoted as saying on Thursday in an unexpected analysis of the issue.
An exiled Iranian opposition group said on Thursday that a delegation of North Korean nuclear and missile experts visited a military site near Tehran in April amid talks between world powers and Iran over its nuclear program.
Iranians will demand their government spend a windfall from the lifting of economic sanctions on improving the quality of life at home, limiting the degree to which a future nuclear deal could fund Tehran's allies on Middle East battlefields.
A senior U.S. official is in Israel to discuss the possibility of a compromise that would keep alive the idea of someday banning nuclear and other weapons of mass destruction in the Middle East, U.S. officials and U.N. diplomats said on Thursday.
The United States tried to deploy a version of the Stuxnet computer virus to attack North Korea's nuclear weapons program five years ago but ultimately failed, according to people familiar with the covert campaign.
Iran's Supreme Leader Ayatollah Ali Khamenei said on Wednesday Tehran would not accept "unreasonable demands" by world powers during negotiations over its disputed nuclear program, and ruled out letting inspectors interview its atomic scientists.