(June 15, 2023, 7:29 AM EDT) -- WASHINGTON, D.C. — A veteran who alleges that his leukopenia was caused by exposure to radioactive plutonium while he was serving in the Air Force in the mid-1960s filed a reply brief in the U.S. Supreme Court arguing that his petition should be granted so the justices can correct an error by the Federal Circuit U.S. Court of Appeals when it held that the Veterans Court lacked the jurisdiction to certify in a single class veterans with both exhausted and unexhausted claims....