Yesterday, Yonhap reported that an unusual billboard had appeared in Times Square in New York: “Korean Unification would be an immeasurable BONANZA for any nations with interests in the Korean Peninsula.” To most of the Americans who read it, the billboard will seem odd, but Korea-watchers will recall when Korean-Americans took out similar ads in the United States, about things that matter much less. Beneath the paywall, we learn that “[t]he ad was set up by Han Tae-gyuk, a 66-year-old Korean-American man, at his own expense,”...