The Yellowstone River flows eastward past the Exxon Mobil refinery, Sunday, July 10, 2011, in Laurel, Mont. Clean-up continues of the 1,000 barrels of oil, which leaked from a broken Exxon Mobil ... more 
The Yellowstone River flows eastward past the Exxon Mobil refinery, Sunday, July 10, 2011, in Laurel, Mont. Clean-up continues of the 1,000 barrels of oil, which leaked from a broken Exxon Mobil pipeline that crosses under the river about a quarter mile below the bridge. It may be two or three weeks before Montana officials can safely launch boats on the Yellowstone River to determine the extent of damage to wildlife from the July 1 oil spill. (AP Photo/Julie Jacobson) less 
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Associated Press | Photo By Julie Jacobson
Sun, Jul 10, 2011 9:52 PM EDT