Tens of thousands of Vietnam veterans with ischemic heart disease, Parkinson’s disease or B cell leukemia should file claims now with the Department of Veterans Affairs for disability compensation, and not wait until VA publishes a regulation officially linking these diseases to wartime service. Advocacy groups are urging the swift filing of claims because veterans eventually found eligible for disability pay for these diseases will be able to receive compensation back to the date their claims were filed. Those who wait for a regulation to add these ailments to VA’s list of diseases presumed caused by exposure to Agent Orange...