from the Times, again:
A federal panel of medical experts studying illnesses among veterans of the 1991 war in the Persian Gulf has broken with several earlier studies and concluded that many suffer from neurological damage caused by exposure to toxic chemicals, rejecting past findings that the ailments resulted mostly from wartime stress.
Among the causes are "a drug, pyridostigmine bromide, given to troops to protect against nerve gas; and pesticides used to protect soldiers in the region."