Subcommittee members, top row, on Energy and Mineral Resources listen to testimony during a hearing on proposed nationwide drilling rules on hydraulic fracturing at the Capitol in Denver on Wednesday,... more 
Subcommittee members, top row, on Energy and Mineral Resources listen to testimony during a hearing on proposed nationwide drilling rules on hydraulic fracturing at the Capitol in Denver on Wednesday, May 2, 2012. From top left: Rep. Scott Tipton, R-Colo., Rep. Mike Coffman, R-Colo., a staff member, Rep. Doug Lamborn, R-Colo., Rep. Rush Holt, D-N.J., and Rep. Diane DeGette, D-Colo. (AP Photo/Ed Andrieski) less 
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Associated Press | Photo By Ed Andrieski
Wed, May 2, 2012 4:01 PM EDT