South Korean and U.S. missiles are displayed at Korea War Memorial Museum in Seoul, South Korea, Tuesday, Jan. 18, 2022. Grappling with pandemic difficulties and U.S.-led sanctions over his nuclear ambitions, North Korean leader Kim Jong Un could be reviving his 2017 playbook of nuclear and missile brinkmanship to wrest concessions from Washington and his neighbors. (AP Photo/Ahn Young-joon)