I. Lewis "Scooter" Libby

Title: Former chief of staff and national security adviser to Vice President Cheney and assistant to President Bush.

Age: 55

Education: Bachelor's degree, Yale University, 1972; JD, Columbia University School of Law, 1975.

Career Highlights: speechwriter, Office of the Secretary, Department of State, 1981-1982; director of special projects, Bureau of East Asian and Pacific Affairs, Department of State, 1982-1985; partner, Dickstein, Shapiro and Morin, 1985-1989; principal deputy undersecretary of defense for strategy and resources, 1990-1992; deputy undersecretary of defense for policy, 1992-1993; legal adviser, House Select Committee on U.S. National Security and Military/Commercial Concerns With the People's Republic of China, 1993-1995; managing partner, Dechert Price and Rhoads law firm, Washington, D.C., 1995-2001.

A onetime protege of Cheney and former deputy defense secretary Paul D. Wolfowitz, who was Libby's political science professor at Yale.

Personal: Lives in McLean with his wife, Harriet Grant, and their two children.

A novelist and avid skier. Has been on crutches after recently breaking a bone in his foot. Has said his father gave him the nickname "Scooter" after seeing him crawl across his crib. Will not say what the "I" stands in his first name. It has been variously reported as short for "Irv" or "Irving," although public databases list him as "Irve."

-- Christopher Lee