US secretary of state John Kerry: said the negotiations “could go either way”. Photograph: Reuters/Leonhard Foeger

The conclusion of a nuclear agreement with Iran, should it happen, will mark only the start of negotiations at home for the White House as it has b(...)

US Secretary of State John Kerry, British Foreign Secretary Philip Hammond and Russian Foreign Minister Sergey Lavrov, meet with foreign ministers from China, Germany and France in Vienna. Photograph: Carlos Barria/Pool photo

A dispute over United Nations sanctions on Iran’s ballistic missile programme is among the issues holding up a nuclear deal between Tehran and six wor(...)

Iranian foreign minister Mohammad Javad Zarif, who met US secretary of state John Kerry three times on Sunday.   Photograph: Shannon Stapleton/Reuters

An Iranian nuclear agreement is possible this week if Iran makes the “hard choices” necessary, but if not, the United States remains ready to walk awa(...)

Strong and persevering

The announcement that the United States and Cuba are to reopen embassies in each other’s capitals tops an auspicious two weeks for President Barack Ob(...)

US secretary of state John Kerry (C) is pictured during an Iran nuclear talks meeting with the Iranian foreign minister in Vienna on Friday. Photograph: Carlos Barria/AFP/Getty Images

The UN nuclear watchdog could issue a report on its investigation into past Iranian research suspected of being linked to nuclear weapons development(...)

An Iranian security guard stands as US secretary of state John Kerry meets the Iranian delegation including foreign minister Mohammad Javad Zarif at a hotel in Vienna where the  nuclear talks meetings are being held. Photograph:  Carlos Barria/Reuters

Tehran and world powers were still shy of a breakthrough at nuclear talks yesterday as foreign ministers flew in to lend heft to negotiations that foc(...)

US secretary of state John Kerry leans his crutches on a table before delivering his statement on Cuba outside the hotel where the Iran nuclear talks meetings are being held in Vienna, Austria. Photograph: Carlos Barria/AFP/Getty Images

The global nuclear watchdog has said its head would fly to Tehran to discuss some of the last big issues that need to be resolved so that Iran and wor(...)

Iranian foreign minister Mohammad Javad Zarif (right) meets with US Secretary of State John Kerry (left) at a hotel in Vienna. Photograph: Carlos Barria/AFP/Getty Images

Senior US and Iranian officials said hard work was still needed as they met in Vienna on Saturday for what could be their final negotiations to bridge(...)

Russian president Vladimir Putin. Photograph: Sergei Karpukhin/AFP/Getty Images

US President Barack Obama spoke with President Vladimir Putin of Russia on Thursday in their first direct contact in four months as the United States (...)

French Senate president Gerard Larcher (left), French president Francois Hollande (centre) and French foreign minister Laurent Fabius (right) attend a meeting the day after WikiLeaks revelations of US spying on French presidents, at the Elysee Palace in Paris. Photograph: Charles Platiau/Reuters

France summoned the US ambassador on Wednesday to explain allegations by transparency lobby group WikiLeaks of what president Francois Hollande brande(...)