Iran nuclear talks: 'Framework' deal agreed

A potentially historic deal has been agreed on limiting Iran's nuclear programme.

After eight days of negotiations in Switzerland, Iran and representatives of six world powers unveiled a framework for curbing the country's nuclear capabilities for at least a decade.

In Washington, US President Obama said the news would make the world safer, as long as a final comprehensive agreement is reached by the deadline of the end of June.

Lyse Doucet reports.