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Drill pipe is positioned above the deck of a Chief Oil and Gas, LLC natural gas rig in Mifflin Township, Pennsylvania, U.S., on Thursday, March 20, 2008. Range Resources Corp., the best- performing oil-and-gas producer in the Standard & Poor's 500 over the past year, is leading a natural-gas rush in Pennsylvania, where Edwin Drake drilled the world's first commercially successful oil well in Titusville in 1859. Photographer: Mike Mergen/Bloomberg News




