More needs to be done despite summit success

The optics was fine and the sound bites heartening. Democratic People's Republic of Korea leader Kim Jong-un and Republic of Korea President Moon Jae-in delivered exactly what they were expected to.

They announced a key document on eliminating mutual military threat, a substantial follow-up to the historic April 27 joint declaration vowing to stop all kinds of hostile acts.

They proposed to jointly host the 2032 Summer Olympic Games. And they reached an agreement on Kim visiting the ROK, along with other measures to broaden and deepen constructive engagement.