In China, collecting on a judgment can be very difficult and once the court issues its decision, it does not have a lot of power to aid in collection.

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While these kinds of batteries are too ungainly to power a hearing aid or a cellphone, they could be made to store lots of electricity.

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Gen Douglas Fraser, head of US Southern Command, insisted US forces were "doing everything in our power to speed aid to Haiti as fast as humanly possible".

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