Stephen Martin Carter

Stephen M. Carter has been our Chief Executive Officer since November 10, 2003 and our President since May 2004. Mr. Carter became a member of our board of directors upon assuming his role as Chief Executive Officer in November 2003. From July 2000 until November 2002, Mr. Carter was President and Chief Executive Officer of Cingular Wireless, a provider of wireless services. Mr. Carter has served in various positions with SBC Communications (now AT&T Inc.) and its predecessor company, Southwestern Bell, including President and Chief Executive Officer of SBC Wireless, President of SBC Strategic and Special Markets and President/Chief Executive Officer of Southwestern Bell Telecom. Mr. Carter also serves on the board of directors of The Corporate Executive Board Company, a leading provider of best practices research and analysis focusing on corporate strategy, operations and general management issues.