Clean up crews use an absorbent boom to collect oil from along side the Yellowstone River in Laurel, Mont., Monday July 4, 2011. An ExxonMobil pipeline near Laurel ruptured and spilled an estimated ... more 
Clean up crews use an absorbent boom to collect oil from along side the Yellowstone River in Laurel, Mont., Monday July 4, 2011. An ExxonMobil pipeline near Laurel ruptured and spilled an estimated 1,000 barrels of crude into the Yellowstone. (AP Photo/Jim Urquhart) less 
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Associated Press | Photo By Jim Urquhart
Mon, Jul 4, 2011 6:35 PM EDT