In September 2008, regulators faced the end of Lehman Brothers and the beginning of a global financial crisis. : Congress has taken away some of the tools that were crucial to us during the 2008 panic. It’s time to bring them back. Mr. Bernanke is a former chairman of the Federal Reserve. Mr. Geithner and Mr. Paulson are former Treasury secretaries. Ten years ago, the global economy teetered in the face of a classic financial panic, the most dangerous type of financial crisis.