Kim Yo Jong, sister of North Korea's leader Kim Jong Un and first vice department director of the ruling Workers’ Party’s Central Committee, looks on at the Metropole hotel during the second North Korea-U.S. summit in Hanoi, Vietnam February 28, 2019. REUTERS/Leah Millis/File Photo

The powerful sister of North Korean leader Kim Jong Un has vowed to boost the country’s nuclear war capability and take other steps to protest the recent arrival of a U.S. nuclear-powered submarine in

Kim Yo-jong, sister of North Korean leader Kim Jong-un, vowed to "continuously and limitlessly" bolster the North's nuclear war deterrent against what it called U.S. threats, denouncing the arrival of a U.

North Korea secured a record-equalling third victory in the Fifa Under-20 Women's World Cup on Sunday, beating Japan 1-0 in Bogota. They became the joint most successful side in the football tournament's history,