James Zumwalt is a retired Marine lieutenant colonel who served in the Vietnam war, the 1989 intervention into Panama and Operation Desert Storm. The son of the late Navy Adm. Elmo R. Zumwalt Jr., he's also a best-selling author, speaker and business executive. The views expressed in this commentary are his own. On Jan. 2, 2000, less than 48 hours into a new millennium, the U.S. Navy lost a 20th century hero and revered, visionary leader. Adm. Elmo R. Zumwalt Jr., 79, had succumbed to mesothelioma -- a lung cancer caused by asbestos exposure, incurred during his naval career. He...