Riot police move through a cloud of tear gas towards protestors outside the National Assembly during a demonstration in Senegal's capital Dakar June 23, 2011. Senegal President Abdoulaye Wade has withdrawn a proposed change to the country's electoral law, the government said, after the bill sparked clashes between riot police and protesters in the heart of the capital. Despite the concession, protesters and members of the security forces, using tear gas and water cannons, fought cat and mouse battles in the streets around the presidency and parliament. REUTERS/Finbarr O'Reilly (SENEGAL - Tags: POLITICS CIVIL UNREST)