<br/>Iran's top opposition leader Mir Hossein Mousavi is challenging the government once again and calling for an anti-government rally to prove the strength of his opposition Green Movement. The call comes just days after Supreme Leader Ayatollah Ali Khamenei told Mousavi and other opposition leaders that they were now excluded from the regime. Mousavi's challenge to Supreme Leader Ayatollah Ali Khamenei to allow opposition forces to demonstrate is a clear act of defiance. It follows the Ayatollah's harsh words, several days ago, to the Assembly of Experts, pronouncing opposition leaders officially outside the regime.