Ross Perot convinced Dr. Robert Haley to start studying Gulf War illness in the early 1990s. The Dallas tycoon and former presidential candidate had approached the University of Texas Southwestern Medical Center at Dallas, where Haley is head of epidemiology, wanting to fund research into the cause of Gulf War illness. An ardent veterans' advocate, Perot steadfastly has disputed scientists' contention that stress is responsible for Gulf War illness. In January 1997, Haley published three papers in the Journal of the American Medical Association describing the results of the Perot-funded research. Haley had done questionnaire surveys in which he asked...