A pro-Kurdish demonstrator covers her face as riot police prevent protestors from marching, at Taksim square in central Istanbul February 15, 2012. Supporters of the pro-Kurdish Peace and Democracy Party (BDP) held a protest to mark the 13th anniversary of the capture of Kurdistan Workers' Party (PKK) leader Abdullah Ocalan. REUTERS/Murad Sezer (TURKEY - Tags: POLITICS CIVIL UNREST CRIME LAW)