Passengers are not the only ones grounded for days by the ash cloud drifting across Europe. Frankfurt, London and other major airports are caring for dozens of animals -- ranging from fish to horses -- trapped in transit by European airspace closures. Flight restrictions have also led to mountains of rotting produce in countries such as Kenya, where losses are estimated at $3 million a day. U.S. imports and exports are also being hit hard, affecting everyone from farmers to auto manufacturers.

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