Kim Yo Jong, sister of North Korea's leader Kim Jong Un attends wreath laying ceremony at Ho Chi Minh Mausoleum in Hanoi, Vietnam March 2, 2019. Kim Yo Jong shows a document to her brother, North Korea's leader Kim Jong Un as U.

The powerful sister of North Korean leader Kim Jong Un dismissed U.S. intent to resume diplomacy on North Korea’s denuclearization, saying Tuesday the North flatly opposes any attempt to deny its pos...