South Korea turned off dozens of high-volume loudspeakers on Monday, putting a halt to the propaganda they normally broadcast over the border into North Korea. The move, a government spokesman said, was designed to set a peaceful tone ahead of the talks between the two Koreas Friday—a tone that was reinforced by the announcement that the countries had committed to work toward a peace agreement. The strikingly amicable inter-Korean summit will in turn set the tone for an upcoming U.S.-North Korea summit, during which President Trump and Kim Jong Un are expected to discuss denuclearization of the Korean Peninsula. But while the South’s loudspeakers have stopped blaring reports critical of the North, forbidden messages are still flowing across the border—on the airwaves of a Christian radio station.
South Korea’s largest religious radio broadcaster, the Far East Broadcasting Company, transmits...