That’s been my worry ever since I was there, and apparently, the South Korean authorities are worried, too. Generally, the “camp follower” subculture that grows up around a U.S. military installation is right outside the gate. In Seoul, that subculture is in Itaewon, several blocks away. Itaewon ended up being the most “foreigner-friendly” zone in Seoul, which attracted third-country nationals and eventually, a large mosque. Today, that mosque sits right on top of “hooker hill,” the, um, intercourse of the...