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(Reuters) - Student supporters of opposition leader Mirhossein Mousavi hold red roses during protests in central Tehran in this December 7, 2009 file photo. Internet messages have been circulating about possible rallies on February 11, 2010, when Iran marks the 31st anniversary of the Islamic revolution. But the climate in the Islamic Republic is much harder than before last year's post-election protests. Picture taken December 7, 2009. REUTERS/via Your View