The U.S. moved on three fronts to prepare the ground for a potential summit with North Korea, as officials said Secretary of State Mike Pompeo would head to New York on Wednesday for a meeting with a top North Korean official.

The planned meeting between Mr. Pompeo and Gen. Kim Yong Chol, often described as North Korean leader Kim Jong Un’s right-hand man, was announced as two separate U.S. teams work in the truce village of Panmunjom and in Singapore on substantive and logistical issues surrounding the potential summit.

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