Iran and the European Union have agreed that Tehran has kept its nuclear promises under an agreement reached in July.
Tehran has freed Washington Post reporter Jason Rezaian and three other Iranian-American dual nationals in a prisoner swap deal that also saw Washington release seven Iranian nationals.
Now that the final steps are being taken to lift economic sanctions against Iran as part of its nuclear agreement with world powers, what are the economic implications of the deal?
Iranian Foreign Minister Mohammad Javad Zarif says international sanctions against Tehran will be lifted on January 16.
The Comoros, an island nation in the Indian Ocean, became the latest ally of Saudi Arabia January 15 to announce that it had cut off diplomatic relations with Iran.
Oil prices plummeted to $29 a barrel on an expected increase in Iranian oil exports as international sanctions are lifted this weekend, dragging stock markets sharply lower around the world on January 15.
The White House says it is waiting for international experts to verify Iran's compliance with a deal to curb its nuclear program before Washington's possible suspension of economic sanctions on Tehran.
Oil prices have slipped below $30 a barrel for the second time this week, amid concerns that Iran could restart exports soon.
U.S. Republican leaders are assailing the White House for what they see as weakness in dealing with Iran only days before Tehran is expected to obtain relief from U.S. economic sanctions.
U.S. Defense Secretary Ash Carter said a navigation error -- not equipment malfunctions -- caused the crews of two Navy boats to stray into Iranian waters, where they were detained overnight by Iran and released.
A diplomatic war of words has erupted on Twitter between Iran and the United Arab Emirates amid deteriorating ties between Tehran and the U.A.E.'s ally, Saudi Arabia.
U.S. Secretary of State John Kerry has stood by ally Saudi Arabia in its rift with Iran over the execution of a Shi'ite cleric, but urged the two to resolve their differences through diplomacy.