Harsh comments by Ayatollah Khamenei have reined in hopes of better cooperation in the wake of the nuclear deal, and new details about the allegations against Jason Rezaian have been made public in recent days.
Saturday's twin bombings at a peace rally in Ankara were the worst terror attack in modern Turkish history. The government says the Islamic State is the likely culprit, but critics accuse the government of complicity.
A nuclear agreement agreed in July has triggered interest from European countries who expect their sanctions to be lifted next year. But the US will maintain non-nuclear sanctions that could stifle investment.
The Islamic Revolutionary Guards Corps projects Iranian military power across the Middle East, to the alarm of critics of the nuclear deal. But it has become entangled in protracted conflicts that are testing its limits.
Crowds who gathered in Iran's capital after breaking their Ramadan fast hailed their negotiating 'nuclear hero' Zarif. Many hailed the prospect that the nuclear deal had opened a door to a brighter future.
Negotiators hail nuclear deal, reached after more than three years of talks, as a 'win-win.' For Iran, the deal to curb its nuclear program and greatly open it up to international scrutiny should pave a path to economic revival, analysts say.
Diplomats underscored their uncertainty about reaching any deal, two days after missing a self-imposed deadline. Still, the talks have witnessed progress that would have been impossible to predict even a few years ago.