Ayatollah Ali Khamenei condemned air attacks as "genocide."

Iran's Supreme Leader reiterated position on signing deal only if sanctions lifted immediately.

Celebrations broke out in the Iranian capital city of Tehran.

Tuesday was the deadline for an outline on Tehran's nuclear program.

Officials hope for breakthrough after almost 18 months of negotiations.

Says deal to transform the relationship between U.S. and Iran could be within reach.

John Kerry due for talks in Geneva with his Iranian counterpart.

U.S. and Iran agree to a seven-month extension to talks.

As Nov. 24 deadline approaches, officials say another interim pact likely.

President Hassan Rouhani said he believed an agreement could be achieved by a Nov. 24 deadline.