If the United States cancels the Iran nuclear deal, the blow to its credibility may be such as to hasten the end of the dollar's reign as the world's reserve currency.
Japan ended a two-year nuclear shutdown in the energy-hungry country, sparked by public fears following the 2011 Fukushima crisis, the worst atomic disaster in a generation.
US President Barack Obama has predicted that opposition to his nuclear deal with Iran will erode as the agreement is implemented and a "parade of horribles" fails to materialize.
A Chinese newspaper with close ties to the ruling Communist Party slammed Japan for commemorating the atomic bombing of Hiroshima without highlighting its own wartime aggression.
Top US military officers sought to reassure worried lawmakers that US forces would check Iran's "malign" influence in the Middle East should Congress greenlight the nuclear deal with Tehran.
French Foreign Minister Laurent Fabius arrived in Iran and said it was time to kickstart relations between the two countries after a nuclear deal made such a change possible.
The Iran nuclear deal is not intended to push Tehran's regime to reform but to prevent it building a bomb, Secretary of State John Kerry told skeptical US lawmakers.
Yukiya Amano, Director General of the IAEA, representatives of the six nations involved in talks to negotiate the Iranian nuclear program, including Russia’s Foreign Minister Sergei Lavrov and US Secretary of State John Kerry will be among those in attendance.
White House contender Mike Huckabee is warning that President Barack Obama is marching the Israelis to the "door of the oven" by signing off on the nuclear deal struck between Iran and six world powers.
NATO hailed the Iran nuclear deal as a "historic breakthrough" that would strengthen global security, but urged Tehran to comply with the terms of the accord.
Iranian President Hassan Rouhani said the conclusion of a nuclear deal with the major powers was "very close" after more than two weeks of intensive talks in Vienna.
Iranian Foreign Minister Mohammad Javad Zarif said a nuclear deal with Western powers was "within reach" and could open the way to joint action against extremism.
US Secretary of State John Kerry said that "it is now time" to finalise a historic nuclear deal with Iran, on a ninth day of talks in Vienna between Tehran and major powers.