An injured opposition party Democratic Alliance (DA) supporter is helped by fellow members after being hit by a stone during their protest march against the Congress of South African Trade Unions (Cosatu) for opposing the youth wage subsidy in Johannesburg, South Africa on Tuesday May 15, 2012. An opposition party march in Johannesburg turned violent Tuesday after union supporters hurled rocks at the leader of South Africa's main opposition party. (AP Photo/Themba Hadebe)