Alan Greenspan, Fed Chair for 18 Years, Dead at 100

Alan Greenspan, who led the Federal Reserve from 1987 to 2006, has died at 100. He served longer than any other Fed chairman in the modern era, overseeing four presidencies and major economic upheavals: the 1987 stock crash, the dot-com bust, and the housing boom preceding the 2008 financial crisis. Economists remain divided on his legacy.