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Yellowstone River flood mixed with spilled oil

Str / Reuters

An emergency response crew hired by Exxon Mobil cleans up an oil spill along the Yellowstone River in Laurel, Montana on July 5. An Exxon Mobil pipeline ruptured on Friday night about 150 miles downstream from Yellowstone National Park near the town of Laurel, just southwest of Billings, dumping up to 1,000 barrels, or 42,000 gallons, of crude oil into the flood-swollen river.

Jim Urquhart / AP

Oil covers a pond alongside the Yellowstone River in Laurel, Mont. on July 5.

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