Military helicopters fly over Tahrir Square as Egypt celebrates the anniversary of an attack on Israeli forces during the 1973 war, in Cairo, 6 October 2013 (Photo: Reuters)
Egyptians comfort a man as he mourns a relative, who was a supporter of ousted President Mohamed Morsi, killed during clashes with security forces in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
Supporters of Egypt's ousted President Mohamed Morsi mourn relatives killed during clashes with security forces in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
An Egyptian mourns a loved one, who was a supporter of Egypt's ousted President Mohamed Morsi, killed during clashes with security forces in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
A riot police officer fires tear gas during clashes between anti-Morsi protesters and members of the Muslim Brotherhood along a road at Ramsis square, which leads to Tahrir Square, at a celebration marking Egypt's 1973 war with Israel, in Cairo, 6 October 2013 (Photo: Reuters)
A riot police officer on a armoured personnel carrier surrounded by anti-Morsi protesters (foreground), fires rubber bullets at members of the Muslim Brotherhood and supporters of ousted Egyptian President Mohamed Morsi along a road at Ramsis square, which leads to Tahrir Square, during clashes at a celebration marking Egypt's 1973 war with Israel, in Cairo, 6 October 2013 (Photo: Reuters)
A man falls during clashes between pro-Morsi protesters and opponents near Ramsis square, which leads to Tahrir Square, at a celebration marking Egypt's 1973 war with Israel, in Cairo, 6 October 2013 (Photo: Reuters)
Egyptian security forces detain suspected supporters of ousted President Mohamed Morsi during clashes in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
A member of the Egyptian security forces holds up his weapon as colleagues detain suspected supporters of ousted President Mohamed Morsi during clashes in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
An Egyptian riot policeman moves into position during clashes with supporters of ousted President Mohamed Morsi, in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
Supporters and opponents of Egypt's ousted Islamist President Mohamed Morsi clash in Cairo, Egypt, 6 Oct 2013 (Photo: AP)
Supporters of ousted Egyptian President Mohamed Morsi carry a wounded protester during clashes with riot police in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
Supporters and opponents of Egypt's ousted Islamist President Mohamed Morsi clash in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
Members of the Muslim Brotherhood and supporters of ousted Egyptian President Mohamed Morsi run from tear gas released by riot police during clashes along a road at Kornish El-Nile, which leads to Tahrir Square, during a celebration commemorating Egypt's 1973 war with Israel, in Cairo, 6 October 2013 (Photo: Reuters)
Military helicopter fly-over gathering in Tahrir Square to celebrate the anniversary of an attack on Israeli forces during the 1973 war, in Cairo, 6 October 2013 (Photo: Reuters)
Egyptians wave national flags, and one holds a poster showing Egyptian Defense Minister Gen. Abdel-Fattah El-Sissi, center, and former presidents Anwar Sadat, left, and Gamal Abdel-Nasser, right, during celebrations marking the 6 October war anniversary, in Tahrir Square, Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
An Egyptian boy in an army costume salutes while posing next to army soldiers atop an armored vehicle guarding an entrance to Tahrir Square, in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
People chant pro-military slogans in Tahrir Square as they celebrate the anniversary of an attack on Israeli forces during the 1973 war, in Cairo, 6 October 2013 (Photo: Reuters)
A man performs traditional Sufi dance as thousands of Egyptians celebrate the 6 October war anniversary, in Tahrir Square, Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
Egyptian girl scouts play drums during celebrations marking the anniversary of the 6 October war with Israel, in Tahrir Square, Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)
An Egyptian female volunteer searches a woman as army soldiers search men at the main entrance to Tahrir Square, in Cairo, Egypt, Sunday 6 Oct 2013 (Photo: AP)