"While the duration of actual combat engagement during the first Gulf War in February 1991 was relatively short, measured in days, the legacy of adverse health effects presumed related to it has been disproportionately lengthy. The constellation of symptom complaints in returned troops termed ‘Gulf War Syndrome’ or more generally, ‘unexplained illness’, has received the bulk of both scientific and public attention. However, a small collection of ‘explained’ adverse health outcomes have also been reported over the 15 years since the War's end. One of the best-characterized examples in this category involves the cluster of DU ‘friendly fire’ incidents and the DU-related health effects accrued to those soldiers who were its victims."