Iran steps up security in Tehran over protest fears.

(From Guardian Unlimited)

Iranian security forces were deploying in strength in Tehran tonight to head off what opposition supporters hope will be massive street protests to challenge the regime as its celebrates tomorrow's anniversary of the 1979 Islamic Revolution.

Mir Hossein Mousavi, leader of the green movement, has called on supporters to behave peacefully during state-sponsored events including a speech by the hardline president, Mahmoud Ahmadinejad, which is likely to be attended by tens of thousands of government loyalists. Green supporters are being asked to chant: "Death to no one, long live everyone" -- a reference to the slogans of "Death to America" and …