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A supporter of the Muslim Brotherhood and Egypt's ousted President Mohamed Morsi block the Six October bridge on July 16, 2013 in the center of Cairo. The demonstrators, demanding the reinstatement of Morsi, clashed with riot police as they tried to block the bridge, one of the main highways in the capital. AFP PHOTO / MARWAN NAAMANIMARWAN NAAMANI/AFP/Getty Images
A supporter of the Muslim Brotherhood and Egypt's ousted President Mohamed Morsi block the Six October bridge on July 16, 2013 in the center of Cairo. The demonstrators, demanding the reinstatement of Morsi, clashed with riot police as they tried to block the bridge, one of the main highways in the capital. AFP PHOTO / MARWAN NAAMANIMARWAN NAAMANI/AFP/Getty Images

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    Morsy supporters hit with tear gas

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Morsy supporters hit with tear gas

CNN's Nick Paton Walsh reports from Cairo, where security forces have fired tear gas at pro-Morsy protesters.

Morsy supporters hit with tear gas

CNN's Nick Paton Walsh reports from Cairo, where security forces have fired tear gas at pro-Morsy protesters.