A participant stands among cut-outs of South Korea’s president Moon Jae-in and North Korea’s leader Kim Jong-un during a pro-unification rally ahead of the upcoming summit between North and South Korea in Seoul, South Korea on Wednesday. Photograph:   Jorge Silva/Reuters

Friday’s meeting between South Korea’s president Moon Jae-in and North Korea’s supreme leader Kim Jong Un will mark the culmination of whirlwind diplo(...)