The U.S. has 16 sectors, ranging from transportation to energy, food, water, financial services and others. But not everybody agrees that all infrastructure sectors are equally critical. A major attack on the country’s financial system would be just as bad, or worse, an expert says. A prolonged power outage would be catastrophic to the banking system, he says. But most in the security community think both are correct, in the sense that both the financial system and ICS need protection from “very severe threats””]