Alan Greenspan, who led the Federal Reserve for 19 years and steered U.S. monetary policy under four presidents, died Monday at 100 — confirmed by his wife, journalist Andrea Mitchell. His tenure was marked by early celebration as a legendary central banker, but his reputation was heavily tarnished by his decisions that contributed to the 2008 financial crisis, the worst economic collapse since the Great Depression. The post accurately reports the death and Greenspan's complex legacy, though it omits that he was celebrated early in his career before the financial crisis reshaped public perception of his tenure.