South African Policeman provide security as farm workers demonstrate against low wages in the background, by placing rocks in a road, in the town of Grabouw, South Africa, Wednesday, Jan. 9, 2013. Striking farm workers on Wednesday set up barricades and threw stones at motorists and police in a South African province whose vineyards are vital to the wine industry, prompting riot officers to close roads and arrest at least 50 demonstrators, South African media reported. (AP Photo/Schalk van Zuydam)

Associated Press
South African Policeman provide security as farm workers demonstrate against low wages in the background, by placing rocks in a road, in the town of Grabouw, South Africa, Wednesday, Jan. 9, 2013. Striking farm workers on Wednesday set up barricades and threw stones at motorists and police in a South African province whose vineyards are vital to the wine industry, prompting riot officers to close roads and arrest at least 50 demonstrators, South African media reported. (AP Photo/Schalk van Zuydam)
South African Policeman provide security as farm workers demonstrate against low wages in the background, by placing rocks in a road, in the town of Grabouw, South Africa, Wednesday, Jan. 9, 2013. Striking farm workers on Wednesday set up barricades and threw stones at motorists and police in a South African province whose vineyards are vital to the wine industry, prompting riot officers to close roads and arrest at least 50 demonstrators, South African media reported. (AP Photo/Schalk van Zuydam)
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