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Supporters of the army hold posters of late Egyptian President Sadat as they protest against ousted Islamist President Mursi and members of the Muslim Brotherhood in Cairo

Supporters of the army hold posters of late Egyptian President Anwar Sadat as they protest against ousted Islamist President Mohamed Mursi and members of the Muslim Brotherhood at Sadat's tomb, during the 40th anniversary of Egypt's attack on Israeli forces in 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.