EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran Protestors gather during a march on a street in Tehran in this picture uploaded on Twitter on June 20, 2009. Defeated Iranian presidential candidate Mirhossein Mousavisaid on Saturday he was "ready for martyrdom" in leading protests that have shaken the Islamic Republic and brought warnings of bloodshed from Iran's Supreme Leader. REUTERS/via Twitter (IRAN ELECTIONS POLITICS CONFLICT IMAGES OF THE DAY) QUALITY FROM SOURCE
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