2 Min Read FILE PHOTO: A makeshift doll is seen at the gate separating Rosebud camp and Sacred Stone, one of the few remaining camps protesting the Dakota Access Pipeline in Cannon Ball, North Dakota, U.S., February 24, 2017. REUTERS/Stephen Yang/File Photo (Reuters) - The U.S. Army Corps of Engineers said two federal attorneys representing it in an ongoing legal battle over the Dakota Access Pipeline are withdrawing from the case, according to court filings, as opponents fight for the line’s closure. The case is being closely watched by native groups and the energy industry, particularly after the Biden administration canceled a permit for the long-gestating Keystone XL project and has taken other steps to limit oil-and-gas exploration.