ROUGH CUT - NO REPORTER NARRATION<br/> <br />STORY: U.S. Secretary of State John Kerry said on Tuesday the current view of the Iran "breakout" period for developing nuclear weapons capability is two months.<br/> <br />"I think it's public knowledge today that we're operating with a time period for a so-called breakout of about two months. That's been in the public domain," Kerry testified at a Senate hearing.<br/> <br />Iran's breakout time is defined as how long it would take it to produce fissile material for one weapon. Constructing a weapon and delivery system would take more time, Kerry said.<br/> <br />Kerry made his comment in response to a question about whether negotiators over Iran's nuclear program were aiming for a 6- to 12-month "breakout" period, which Kerry declined to confirm as talks are continuing.