2 dead, 1 injured in Pa. zinc plant explosion

Emergency workers gather in the parking lot after an explosion at the Horseheads Inc. zinc plant in Monaca, Pa., Thursday, July 22, 2010. (AP Photo/Keith Srakocic)

July 22, 2010 6:02:46 PM PDT
An explosion Thursday at a zinc smelting plant in western Pennsylvania killed two people and injured at least one, authorities said.

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