Ed Whitacre, chairman emeritus of AT&amp;T Inc. and former chairman of General Motors Co., poses for a portrait with a signed book during a party at the Roosevelt House in Washington, D.C., U.S., on Monday, Feb. 11, 2013. Whitacre wrote the book  American Turnaround: Reinventing AT&amp;T and GM and the Way We Do Business in America  which chronicles his career in business.