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Questions remain after crews contain Keystone Pipeline's largest spill
NBC News Clone summarizes the latest on: Mmvo157273157586 - Breaking News | NBC News Clone. This article is rewritten and presented in a simplified tone for a better reader experience.
The largest breach that Keystone Pipeline had ever faced has been contained, though it is unknown what cause 600,000 gallons of tar sands oil to spill into a Kansas creek. NBC News' Cori Coffin reports on the clean-up effort and the oil's effect on the local environment and residents.
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