FILE - South Korean President Moon Jae-in, front left, shakes hands with North Korean leader Kim Jong Un's younger sister Kim Yo Jong during the opening ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea on Feb. 9, 2018. North Korea basked in the global limelight during the last Winter Games in South Korea, with hundreds of athletes, cheerleaders and officials pushing hard to woo their South Korean and U.S. rivals in a now-stalled bid for diplomacy. Four years later, as the 2022 Winter Olympics come to its main ally and neighbor China, North Korea isn't sending any athletes and officials because of coronavirus fears. (Kim Ju-sung/Yonhap via AP, File)

FILE - North Korean cheerleaders sing during the men's 500 meters short track speedskating semifinal in the Gangneung Ice Arena at the 2018 Winter Olympics in Gangneung, South Korea, on Feb. 22, 2018. North Korea basked in the global limelight during the last Winter Games in South Korea, with hundreds of athletes, cheerleaders and officials pushing hard to woo their South Korean and U.S. rivals in a now-stalled bid for diplomacy. Four years later, as the 2022 Winter Olympics come to its main ally and neighbor China, North Korea isn't sending any athletes and officials because of coronavirus fears. (AP Photo/David J. Phillip, File)

FILE - North Korea's Hwang Chung Gum and South Korea's Won Yun-jong carry the unification flag during the opening ceremony of the 2018 Winter Olympics in Pyeongchang, South Korea on Feb. 9, 2018. North Korea basked in the global limelight during the last Winter Games in South Korea, with hundreds of athletes, cheerleaders and officials pushing hard to woo their South Korean and U.S. rivals in a now-stalled bid for diplomacy. Four years later, as the 2022 Winter Olympics come to its main ally and neighbor China, North Korea isn't sending any athletes and officials because of coronavirus fears. (AP Photo/Jae C. Hong, File)

FILE - North Korean leader Kim Jong Un, left, and U.S. President Donald Trump shake hands prior to their meeting on Sentosa Island in Singapore on June 12, 2018. North Korea basked in the global limelight during the last Winter Games in South Korea, with hundreds of athletes, cheerleaders and officials pushing hard to woo their South Korean and U.S. rivals in a now-stalled bid for diplomacy. Four years later, as the 2022 Winter Olympics come to its main ally and neighbor China, North Korea isn't sending any athletes and officials because of coronavirus fears. (AP Photo/Evan Vucci, File)

FILE - This file photo provided on Jan. 15, 2022, by the North Korean government shows a missile test from railway in North Pyongan Province, North Korea, on Jan. 14, 2022. Independent journalists were not given access to cover the event depicted in this image distributed by the North Korean government. The content of this image is as provided and cannot be independently verified. Korean language watermark on image as provided by source reads: "KCNA" which is the abbreviation for Korean Central News Agency.(Korean Central News Agency/Korea News Service via AP, File )