For a town entangled in a national controversy, Waegwan's streets give off an eerie languor. Ask residents in this South Korean burg about Agent Orange — the code name for a poisonous blend of herbicides that three U.S. Army veterans allege they buried near there in 1978 — and nearly all sigh wearily. The accusation isn't surprising, bemoans Chang Jung-hun, a 69-year-old melon farmer. He says South Korean politicians regularly criticize American military installations for polluting surrounding villages. The latest flare-up, which surfaced in May when the whistle-blowers aired their claims on an Arizona television program, is nothing new.