US, Iran experts dispute nuclear bomb 'breakout' timeline
A US security institute estimates that Iran could amass material for a nuclear bomb in three months or less while Iranian experts cite a time frame six times longer - a dispute going to the heart of talks between Tehran and global powers.


Differences over how fast Iran could "break out" a nuclear weapon complicate the quest for a deal by late July under which Iran would scale back its atomic energy programme in exchange for a lifting of crippling sanctions. (Reuters)