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Tourists killed in South Africa national park, authorities say

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In this photograph taken Tuesday July 19, 2011 a convoy of army vehicles make their way to an isolated outpost in the Kruger National Park's Sabi River valley, close to the Mozambican border, to stage a night patrol for visiting press. Armed soldiers, park officials, judicial, customs and tax officers are coordinating a multi-pronged strategy in a bid to end rhino poaching in the country's flagship park. (AP Photo/Denis Farrell)