Striking members of the Congress of South African Trade Unions (COSATU) march through the Durban city centre March 7, 2012. Tens of thousands of South Africans staged a one-day national strike on Wednesday, hitting mining production, as the biggest labour group in the continent's largest economy flexed its muscles to remind the ruling African National Congress (ANC) of its political clout. The immediate targets of the strike are new road tolls around Johannesburg, and short-term contract labour agencies that COSATU says exploit workers and perpetuate the inequalities of the white-minority apartheid rule that ended in 1994. REUTERS/Rogan Ward (SOUTH AFRICA - Tags: BUSINESS EMPLOYMENT CIVIL UNREST POLITICS)