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The widow and son of late President Anwar Sadat pay their respects at his tomb in Cairo

Jehan Sadat, the widow of late President Anwar Sadat (3rd R), and his son Gamal al-Sadat (2nd R) pay their respects at Sadat's tomb 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.