South Korean President Moon Jae-in, left, and North Korean leader Kim Jong Un shake hands after signing a joint declaration at the Paekhwawon State Guesthouse in Pyongyang, North Korea, on Wednesday.

South Korean President Moon Jae-in, left, and North Korean leader Kim Jong Un shake hands after signing a joint declaration at the Paekhwawon State Guesthouse in Pyongyang, North Korea, on Wednesday.