Is North Korea Causing Troubling or Giving Peace a Chance?

President Moon Jae-un of South Korea, far left, and Kim Yo-jong of North Korea, far right, watching the two countries’ combined women’s hockey team compete at the Winter Olympics on Saturday.After its charm offensive at the Olympics, North Korea’s delegation has returned home from South Korea, leaving some questions behind. Chief among them: Can the new opening between the two Koreas, begun amid the feel-good spirit of the Winter Games, be nudged and nurtured into serious dialogue over North Korea’s nuclear program?

While still a long shot, there’s a somewhat better chance of engagement now owing to two developments since President Moon Jae-in of South Korea, Vice President Mike Pence, Prime…