Two months after the dramatic Trump-Kim meeting at the Demilitarized Zone between North and South Korea, the world's most heavily fortified border is back to its perpetual state of tension, as if nothing happened.

When U.S. President Donald Trump set foot into North Korea and shook hands with Chairman Kim Jong Un, there was hope that relations between the two adversaries would see a further thaw.

But now, remnants of the remarkable rendezvous are nowhere to be seen.