ConocoPhillips CEO James Mulva, left, and ExxonMobil CEO Rex Tillerson stand up and gather their things on Capitol Hill in Washington, Thursday, May 12, 2011, after testifying before the Senate ... more 
ConocoPhillips CEO James Mulva, left, and ExxonMobil CEO Rex Tillerson stand up and gather their things on Capitol Hill in Washington, Thursday, May 12, 2011, after testifying before the Senate Finance Committee. less 
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Associated Press | Photo By Alex Brandon
Thu, May 12, 2011 1:05 PM EDT