Protesters throw stones at army soldiers as they take cover at the cabinet near Tahrir Square in Cairo December 16, 2011. Stone-throwing demonstrators clashed with troops wielding truncheons and electric prods in central Cairo on Friday, witnesses said, in the worst violence since the start of Egypt’s first free election in six decades. REUTERS/Amr Abdallah Dalsh (EGYPT – Tags: CIVIL UNREST POLITICS)