New diplomatic and security ties are reshaping the Middle East as former enemies seek unity in containing Iran, the U.S. rethinks its security role in the region, and Russia and China seek to exploit openings left by Washington.

A historic summit illustrates the changing alignments, bringing Arab, Israeli and U.S. officials together for the first time on Israeli soil for talks on expanding their budding partnership.

Israeli and Arab diplomats said they were discussing unprecedented, formal defense partnerships, as well as new military and economic ties and a joint strategy for Iran.