The nuclear agreement between Western powers and Iran was broadly welcomed by politicians, former world leaders and Middle East experts.
As Sergei Lavrov and John Kerry bid for a peaceful resolution to Syria, a former British diplomat says the US is "taking on the master".
Is Russia's proposal for international monitors to oversee Syria's arsenal of chemical weapons, serious diplomacy or just making trouble?
US Secretary of State John Kerry said he would meet the Russian Foreign Minister Sergei Lavrov in late September to continue talks on Syria's chemical weapons.
US Secretary of State John Kerry has rejected President Bashar al-Assad's 30-day deadline for submitting weapons data and said words are not enough.
US Secretary of State, John Kerry, has arrived in Geneva for talks with his Russian counterpart Sergei Lavrov on the Syria crisis.
US Secretary of State John Kerry will meet with his Russian counterpart Sergei Lavrov later today in Geneva.
The talks will centre around Russia's proposal for international monitors to oversee Syria's arsenal of chemical weapons.
Expectations are being kept deliberately low ahead of US Secretary of State John Kerry's meeting with his Russian counterpart Sergei Lavrov tomorrow.
They may talk at a hotel here in Geneva for up to three days - negotiations that will include the UN.
Before I left Moscow this afternoon, we were being told that the Russians don't have a complete plan, but are bringing a number of ideas about how to deal with Syria's chemical weapons.
We are also told that anything at the UN that authorises the use of force against Syria will hit a Russian veto.
The Russians have not been comfortable being seen as the supporters of a regime that is widely believed to have gassed its own people and killed 400 children.
If they could say: 'We've sorted out this chemical weapons problem through a deal here,' that would put them in a more comfortable position.
The Russian offer for international supervision of Syria's chemical weapons has taken yet more of the wind from President Obama's sails.
He is due to start making his case for military action again later tonight. But as Washington Correspondent Robert Moore reports, public support for it is still falling.
This video contains distressing images of the chemical attacks in Syria.
Former presidential candidate John McCain has said John Kerry was "unbelievably unhelpful" when the Secretary of State said that any strike on Syria would be "unbelievably small."
Kerry says #Syria strike would be "unbelievably small" - that is unbelievably unhelpful
William Hague reiterated that Britain would push for "unfettered" UN access to Syria to deal with the humanitarian crisis in the country.
Foreign Secretary William Hague, speaking at a joint press conference with US Secretary of State John Kerry, said the two countries' "objectives and efforts remain closely aligned" despite the Parliamentary vote against UK military action in Syria.