Brazil's Vale dam disasters trigger $2 billion in fresh writedowns

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AMERICAN AIRLINES (NASDAQ: AAL) Delayed: 14.43 -0.4 (2.7%)
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BHP BILLITON LIMITED (NYSE: BHP) Delayed: 88.37 +1.59 (1.83%)
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RIO TINTO PLC (NYSE: RIO) Delayed: 97.21 +1.53 (1.60%)
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