James A. Henderson was Chairman of the Board from 1995 and Chief Executive Officer from 1994 of Cummins Inc. (manufacturer of diesel and natural gas engines), Columbus, Indiana, until his retirement in December 1999. Mr. Henderson has been a Director of AT&T Inc. since October 1999. He served as a Director of Ameritech Corporation from 1983 until the company was acquired by SBC in 1999. He also served as a Director of Indiana Bell Telephone Company (which became a subsidiary of Ameritech) from 1978 until 1983. Mr. Henderson is a Director of International Paper; Nanophase Technologies Corporation; Rohm and Haas Company; and Ryerson Tull, Inc.