ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: Riot police cleared Tahrir square after clashes went on for several hours with protesters.<br/> <br />Tens of civilians were seen on the riot police's side aiding them fight off protesters in Tahrir square.<br/> <br />Security forces in Cairo fired tear gas on Tuesday to disperse protesters, as clashes erupted between supporters of Egyptian military General Abdel Fatah al-Sisi, and crowds gathered to commemorate bloody clashes two years ago that left 42 dead.<br/> <br />The protests were a mark of the turmoil that has dogged Egypt since the army ousted elected Islamist President Mohamed Mursi in July and took back control of the Arab world's most populous state.<br/> <br />Protests by Egyptians opposed both to military-dominated rule and Mursi's Muslim Brotherhood movement began in downtown Cairo on Monday night.<br/> <br />Since the military removed Mursi, the country's first democratically elected president in early July, army chief Sisi has become a wildly popu
