A senior U.S. official said on Friday that it is unclear whether Iran is ready to take the steps necessary to assure the world its nuclear ambitions are entirely peaceful, Reuters reports.
The comments by Under Secretary of State for Political Affairs Wendy Sherman, who has been leading the U.S. team in the negotiations with Iran, came at the end of the latest round of talks between Iran and the six world powers, aiming to turn an interim deal signed in November into a comprehensive settlement by July 20.