Montana Governor Brian Schweitzer asks questions of ExxonMobil representatives during a briefing about the oil spill in the Yellowstone River, Tuesday July 5, 2011, in Billings, Mont. An ExxonMobil ... more 
Montana Governor Brian Schweitzer asks questions of ExxonMobil representatives during a briefing about the oil spill in the Yellowstone River, Tuesday July 5, 2011, in Billings, Mont. An ExxonMobil pipeline near Laurel, Mont., ruptured last Friday 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
Tue, Jul 5, 2011 4:35 PM EDT