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A man holds a poster Army Chief Sisi at the tomb of late Egyptian President Sadat, in Cairo

A man holds a poster Army Chief General Abdel Fattah al-Sisi at the tomb of late Egyptian President Anwar Sadat, during the 40th anniversary of Egypt's attack on Israeli forces during the 1973 war, at Cairo's Nasr City district, October 6, 2013. REUTERS/Amr Abdallah Dalsh

Violence as Egypt marks 40th anniversary of October 6 war

Clashes erupt as the country

celebrates the 40th anniversary of an Egyptian attack on Israeli forces.