If U.S. Secretary of State John Kerry pulls off a nuclear deal with Iran, it will be a singular achievement in a long career in which the grand prize has eluded him.
The United States and its NATO allies are preparing militarily for the prospect that their rift with Russia could outlast President Vladimir Putin, U.S. Defense Secretary Ash Carter said on Sunday.
France's Foreign Minister Laurent Fabius said on Sunday it was unclear whether an international deal could be reached on Iran's nuclear program by a June 30 deadline.
NATO's top commander said on Wednesday Russia's announcement it was adding 40 new intercontinental ballistic missiles to its nuclear arsenal was not the kind of behavior expected of a responsible nuclear power.
Iranian President Hassan Rouhani said on Saturday a comprehensive nuclear deal could be delayed if world powers brought new issues into play, and he would not accept a U.N. inspections regime that jeopardized state secrets.
Iran and six world powers resumed negotiations on its nuclear program on Thursday, the Iranian state news agency IRNA said, seeking to overcome remaining differences with a self-imposed June 30 deadline looming to end a 12-year standoff.
A senior U.S. congressman on Tuesday accused the Iranian government of spitting in America's face by holding U.S. citizens while negotiating an end to sanctions in return for curbing its nuclear program.
A self-imposed deadline of June 30 for Iran and six major powers to reach a final nuclear deal to resolve a decade-long standoff may be extended, Iran's state TV reported.
The United States and two key Asian allies discussed how to increase pressure on North Korea to halt its nuclear program and will urge China to help bring Pyongyang back to the negotiating table, officials said.
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.
The United States is discussing with China imposing further sanctions against North Korea as the reclusive country is "not even close" to taking steps to rein in its nuclear weapons program, U.S. Secretary of State John Kerry said on Monday.
The Saudi king's absence from a regional summit to be hosted by President Barack Obama shows how Gulf states, displeased by what they see as U.S. indifference to Iranian meddling in the Arab world, may hesitate to bless any nuclear deal with Tehran.
Satellite images taken between January and this month show a North Korean nuclear reactor that can yield material for atomic bombs may be operating again at low power or intermittently, U.S. experts said on Wednesday.
Britain has informed a United Nations sanctions panel of an active Iranian nuclear procurement network linked to two blacklisted firms, according to a confidential report by the panel seen by Reuters.
Iranian Foreign Minister Mohammad Javad Zarif will meet U.S. Secretary of State John Kerry at the opening of a UN conference on the global anti-nuclear weapons treaty on Monday, as they try to make progress in talks on a long-term atomic deal.
A Japanese man has been arrested for landing a drone on the prime minister's office with a minuscule amount of radiation in an apparent protest against the use of nuclear power, four years after the Fukushima disaster.
The timing and scope of sanctions relief are among crucial sticking points as Iran and the six major world powers resume talks in Vienna on Wednesday to discuss a nuclear agreement aimed at curbing Tehran's nuclear activities by June 30.
A compromise allowing the U.S. Congress to vote on a nuclear deal with Tehran may prompt Iranian negotiators to drive a harder bargain, but does not drastically weaken President Barack Obama's ability to deliver on a final agreement.
Israel is pleased at a compromise deal on Iran achieved between the United States Congress and the administration of President Barack Obama, Israeli Intelligence Minister Yuval Steinitz said on Wednesday.
Iran and Israel have been cooperating under the auspices of an international body set up to monitor a ban on nuclear bomb tests, its director said on Monday.
As the United States and Iran come closer to a historic nuclear deal, many U.S. states are likely to stick with their own sanctions on Iran that could complicate any warming of relations between the long-time foes.