Rosso and Jonas are both from the northern Mexican city of Monterrey, where they were active in the local band circuit.

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While Vieux Farka Toure takes his band on the festival circuit in London, British guitarist Justin Adams takes time out from his gig with Robert Plant to rock out with Juldeh Camara, a traditional Fulani musician from the Gambia.

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The narrow quoting band being discussed would fall within the circuit breaker limits put in place last month that suspend trading in a stock that moves 10% or more from its price.

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The band moved to New York and became The Smoothies, where they played on the club circuit and recorded two singles.

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The flexible, rubberised band was meant to be showerproof but Jawbone discovered it was being overflexed by users, causing cracks in the circuit boards and allowing water to enter.

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