Celebrations on the streets of Cairo as Egyptians mark the 40th anniversary of the 1973 war with Israel. Amid tight security over concerns of Muslim Brotherhood protests -- Egyptians gather around Tahrir Square. Some have their faces painted with the Egyptian flag -- others hold posters of armed forces chief, General Abdel-Fattah al-Sisi. One veteran of the Mideast war is now focussing on future challenges. .