Kerry says obstacles to Iran deal mostly ‘political’

Kerry, returning to talks with Iran on its nuclear program, says most of the differences still barring an agreement are political rather than technical.

Kerry, who is to sit down today in Switzerland with Iranian Foreign Minister Mohammed Javad Zarif, tells CBS News that Tehran must fulfill “the promise of proving to the world” that its nuclear program is peaceful.

Kerry says “there are clearly some differences that still rest on a technical judgment.”

“But by and large, most of the differences now are political decisions that need to be made in order to fulfill the promise of proving to the world that a program is peaceful,” he adds. Kerry said in an interview on CBS News that Tehran “to its credit has thus far lived up to every part of the agreement we made over a year ago.”