( October 26, 2026, 3:07 PM EDT) -- OXFORD, Miss. —The United States, on behalf of the U.S. Environmental Protection Agency, filed an intervenor complaint as a plaintiff on Oct. 23 in a lawsuit filed in a federal Mississippi court by the NAACP against xAI Corp. and an energy infrastructure affiliate over the construction and operation of dozens of gas combustion turbines that power a Memphis, Tenn., data center and asserted a cross-claim for a declaration that the Clean Air Act (CAA) authorizes the government to dismiss the citizen suit and that the suit cannot proceed over its objection....