Congress members seek investigation of Shell barge - Article Photos 7/13

A salvage team moves an emergency towing system across the deck of petroleum drilling ship Kulluk in this photo made Wednesday, Jan. 2, 2013, and provided by the U.S. Coast Guard. There's no indication of a fuel leak from Kulluk, the Coast Guard said Wednesday night, Jan. 2, 2013, of a maritime accident that has refueled debate over oil exploration in the U.S. Arctic Ocean. (AP Photo/U.S. Coast Guard)