North Korea's leader Kim Jong Un attends a welcoming ceremony and review an honor guard at the Presidential Palace in Hanoi on March 1, 2019. Photo: Manan Vatsayayna/AFP via Getty Images.

North Korea's leader Kim Jong Un attends a welcoming ceremony and review an honor guard at the Presidential Palace in Hanoi on March 1, 2019. Photo: Manan Vatsayayna/AFP via Getty Images.