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In this image provided by the U.S. Coast Guard the conical drilling unit Kulluk sits grounded 40 miles southwest of Kodiak City, Thursday, Jan. 3, 2012. The Kulluk grounded after many efforts by tug vessel crews and Coast Guard crews to move the vessel to safe harbor during a winter storm.Calls for federal scrutiny of Royal Dutch Shell PLC drilling operations in Arctic waters swelled Thursday with a request for a formal investigation by members of Congress. (AP Photo/U.S. Coast Guard, Petty Officer 2nd Class Zachary Painter)

Associated Press
In this image provided by the U.S. Coast Guard the conical drilling unit Kulluk sits grounded 40 miles southwest of Kodiak City, Thursday, Jan. 3, 2012. The Kulluk grounded after many efforts by tug vessel crews and Coast Guard crews to move the vessel to safe harbor during a winter storm.Calls for federal scrutiny of Royal Dutch Shell PLC drilling operations in Arctic waters swelled Thursday with a request for a formal investigation by members of Congress. (AP Photo/U.S. Coast Guard, Petty Officer 2nd Class Zachary Painter)
In this image provided by the U.S. Coast Guard the conical drilling unit Kulluk sits grounded 40 miles southwest of Kodiak City, Thursday, Jan. 3, 2012. The Kulluk grounded after many efforts by tug vessel crews and Coast Guard crews to move the vessel to safe harbor during a winter storm.Calls for federal scrutiny of Royal Dutch Shell PLC drilling operations in Arctic waters swelled Thursday with a request for a formal investigation by members of Congress. (AP Photo/U.S. Coast Guard, Petty Officer 2nd Class Zachary Painter)
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