C Michael Armstrong (born 18 October 1938, in Detroit, Michigan) is the former AT&T chairman and CEO, who tried to reestablish AT&T as an end-to-end carrier. Unfortunately, due to the dot.com bust and various other issues, he was forced to break the group up in 2001. He resigned in 2002 and was succeeded by AT&T President David Dorman.
He is also the former CEO of Hughes Electronics, and Comcast Corporation. He worked for IBM from 1961 to 1992. He served as a Director of Citigroup from 1989 to 2010. Armstrong is a member of the Alfalfa Club and the Council on Foreign Relations. He received his BS in Business at Miami University in 1961.