Associated Press: The federal government filed a lawsuit Thursday against DTE Energy Co., accusing the utility of modifying a major coal-fired plant without permits and the best equipment to control pollution. The lawsuit asks a judge to consider shutting down Monroe Unit 2 until it complies with clean-air laws. Fines could be as high as $37,500 a day. In response, the utility said the government is wrong and no new permit was required. The lawsuit is an "absurd and overly aggressive …