The Justice Department has backed away from a court battle over its authority to classify and restrict the discussion of information it has already released, handing a local advocacy group a victory by granting it explicit permission to publish letters written by two senators that contain the contested information. The case was considered a potential test of limits to the government's power to restrict access to information in the public domain on national security grounds. Former attorney general John D. Ashcroft had strongly defended the practice in this case by likening it to putting "spilt milk" back in a jar...