U.S. Secretary of State John Kerry will travel to Geneva to join talks on Iran's nuclear program, as Tehran and six world powers inch closer to an elusive breakthrough.<br/> <br />Russian Foreign Minister Sergei Lavrov arrived in Geneva on Friday evening and met with the Iranian Foreign Minister, who had arrived earlier on.<br/> <br />Meanwhile, speaking to reporters in Paris, French Foreign Minister Laurent Fabius:<br/> <br />(SOUNDBITE) (French) FRENCH FOREIGN AFFAIRS MINISTER, LAURENT FABIUS, SAYING:<br/> <br />"You know the position of the six -- the five permanent members plus Germany, the Security Council plus Germany: our position is firm, but we also wish to find a solution. (JOURNALIST ASKING "Are you optimistic?") I am determined."<br/> <br />The U.S. and other Western powers say there is no such thing as a right to enrich uranium.<br/> <br />But Iran views it as a matter of national sovereignty and crucial to any deal that would resolve a decade-old standoff over its nuclear intentions.