With preparations underway for a third summit between South and North Korea in September, it may be easy for some people to forget that not much has changed. That would be a mistake. The world should not yet let its guard down. North Korea remains a nuclear threat, and its regime seems to be as repressive as it has been.

Granted, recent Korean summits have eased tensions and brought about a sense of hope. The most dramatic of those summits remains fresh in our collective memory – that historic meeting in June between Kim Jong-un and Donald Trump, the first incumbent US president to meet with a North Korean leader. And next month, Moon Jae-in will be the first South Korean president to visit the North’s capital, Pyongyang, in about a decade.