The comptroller general of the U.S. government is warning there are striking similarities between the current situation in the United States and the end of the Roman Empire. In a new report, David Walker said the U.S. is now facing many of the same factors that brought down Rome, including “declining moral values and political civility at home, an over-confident and over-extended military in foreign lands and fiscal irresponsibility by the central government.” Walker predicted the U.S. is “on a path toward an explosion of debt.” As comptroller general, Walker is in charge of the nonpartisan Government Accountability Office, often described as the investigative arm of Congress.