KINSTON -- Vietnam veteran Ted Sampley has his mouth locked, loaded and ready to fire. Ask him about Democratic presidential candidate John Kerry and he cuts loose. He calls the Massachusetts senator "Hanoi John" because of his opposition to the Vietnam War. Kerry is a traitor, he says, not fit to be commander in chief. It's a view that might ordinarily be dismissed as political rhetoric in an election year. But Sampley, an outspoken advocate for missing servicemen, is not easily ignored. Tapping his extensive contacts with veterans and the range of the Internet, he has mounted a campaign against...