A couple of Islamist protesters hold up a poster with a picture of Osama bin Laden that reads, "Man humiliated Americans. He lives benign and died a martyr" during a protest march at the main entrance of the state security headquarters in Cairo May 2, 2013. Egyptian security forces fired tear gas to disperse a small group of hardline Islamist protesters who were attempting to scale the walls of the state security headquarters in a Cairo suburb late Thursday night. REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS CIVIL UNREST RELIGION)