Today's goal is Shuaiba, the smallest of southern Iraq's five power stations but a key to powering the two damaged 400-kilovolt transmission lines in the south that will help light up Baghdad and restart oil refineries.

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The training to open their mouths was key to staff spotting a rotting upper left canine bothering Arktos last year and a damaged tooth that troubled Walker in 2011.

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This could reduce productivity if it damaged the global manufacturing supply chain, which often involves multi-national companies ordering many of their key components from overseas.

BBC: Terrorism 'slows globalisation'