Energy Secretary Steven Chu, back to camera, is greeted on Capitol Hill in Washington, Wednesday, March 16, 2011, by Rep. Ed Markey, D-Mass., center, Rep. Ed Whitfield, R-Ky., left, and Rep. Diana ... more 
Energy Secretary Steven Chu, back to camera, is greeted on Capitol Hill in Washington, Wednesday, March 16, 2011, by Rep. Ed Markey, D-Mass., center, Rep. Ed Whitfield, R-Ky., left, and Rep. Diana DeGette, D-Colo. prior to testifying before a joint House subcommittee on Energy and Power and the House subcommittee on Environment and the Economy hearing. (AP Photo) less 
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Associated Press
Wed, Mar 16, 2011 12:12 PM EDT