Fresh push for Iran nuclear deal
20 November 2013 Last updated at 06:07 GMT
US President Barack Obama has urged US senators to hold off from proposing more sanctions against Iran to allow time for world powers to complete a deal on Iran's nuclear programme.
His comments came as envoys from the P5+1 group of nations gathered in Geneva for a new round of negotiations with Iran.
The BBC's Kim Ghattas reports on what the discussions might achieve.