The much ballyhooed planned summit in Singapore on June 12 between US President Donald Trump and North Korean President Kim Jong-un is on shaky ground, and not due to any new nuclear weapon tests.

It has become a battle between definitions.

What does denuclearization mean? It depends on where you sit.

• Peace is complicated
• Obtaining peace is often an asymmetrical power game
• Can we expect North Korea to give up its nuclear program unilaterally?
• What confidence-building measures can the U.S., its allies, or other countries do to contribute to a lasting peace on the penninsula?