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(...)

Since Stuxnet’s exposure in 2010, 20 countries have announced digital warfare programmes

The Stuxnet computer worm temporarily succeeded in its goal of crippling Iran’s controversial uranium enrichment programme but, as the world’s first d(...)

By any standards the late Fr Theodore (Ted) Hesburgh, who has died aged 97, was an extraordinary Irish American. With a score of 150, he held the Guin(...)

Iranian foreign minister Mohamad Javad Zarif greets his supporters as he arrives from Lausanne, Switzerland to Mehr-Abad airport in Tehran. Iran and six world powers have agreed on the key points of a deal over Iran’s controversial nuclear programme. Iranians are so happy by hearing that world powers are ready to lift the sanctions against the country. Photograph: Borna Qasemi/EPA

Sanctions Iran wanted immediate removal of all UN sanctions and relief from the American and European economic and financial curbs that have throttled(...)

Searching  for a deal ....  US secretary of state John Kerry looks at the view of Lake Geneva from his hotel room as the Iran nuclear talks continue, in Lausanne, Switzerland, on Wednesday. Photograph: Laurent Gillieron/EPA

Major powers and Iran were closer to a preliminary accord on reining in Tehran’s nuclear programme as marathon talks ran into Wednesday, but they hit (...)

US president Barack Obama and Indian prime minister Narendra Modi in the gardens of Hyderabad House in New Delhi. Photograph: Jim Bourg/Reuters

Indian prime minister Narendra Modi and US president Barack Obama today announced that they had broken their six-year impasse over a civilian nucle(...)

Tom Dunne: interviewed 11 of the German spies caught in Ireland during the Emergency

Tom Dunne, who has died aged 96, was a distinguished public servant who wore his experience at the heart of the international diplomatic world with gr(...)

US secretary of state John Kerry in Vienna with foreign ministers Philip Hammond of the UK, Sergei Lavrov of Russia, Javad Zarif of Iran, Frank- Walter Steinmeier of Germany, Laurent Fabius of France and EU envoy Catherine Ashton and Chinese foreign minister Wang Yi. Photograph: Joe Klamar/Reuters

Iran and six world powers failed on Monday for a second time this year to resolve their 12-year dispute over Tehran’s nuclear ambitions, and gave them(...)

With the November 24th deadline looming for the expiry of an interim agreement on Iran’s nuclear programme, the prospects for a comprehensive deal rem(...)