
South Korean tennis phenom Chung Hyeon holds a news conference after beating Tennys Sandgren of the United States 3-0 (6-4, 7-6 (7-5), 6-3) in the quarterfinals at Rod Laver Arena in Melbourne on Jan. 24, 2018. Chung, 21, became the first South Korean tennis player to reach a semifinals at a Grand Slam event. (Yonhap)

This combined photo carried by a North Korean state propaganda site, DPRK Today, on Jan. 22, 2018, shows Masikryong Ski Resort on the North’s east coast. Last week, South and North Korea agreed to conduct joint training for skiers there before the opening of the Feb. 9-25 PyeongChang Winter Olympics in the South. (Yonhap)

Former President Lee Myung-bak is pictured in front of his office in Seoul on Jan. 22, 2018, amid reports that posecution investigators raided the residence and office of Lee Sang-deuk, an elder brother of the former president, as part of a probe into allegations that the elder Lee accepted illicit money from the state spy agency. (Yonhap)

A Canadian veteran of the 1950-53 Korean War, Claude Charland (L), receives a plaque of appreciation from Army Maj. Gen. Park Jung-hwan, chief of the 1st Infantry Division, before a commemorative ice hockey game, the Imjin Classic 2018, at the Yulgok Wetland Park in the South Korean border town of Paju, north of Seoul, on Jan. 19, 2018. The Canadian Embassy organized the game, which coincided with the Feb. 9-25 PyeongChang 2018 Winter Olympics torch relay, in partnership with the PyeongChang Organizing Committee. During the 1950-53 Korean War, Canadian soldiers stationed near the front lines carved out a makeshift hockey rink on the frozen Imjin River, and two regiments played friendly hockey matches. (Yonhap)

This photo, provided by South Korea’s unification ministry on Jan. 15, 2018, shows Hyon Song-wol, the leader of the all-female Moranbong Band, attending inter-Korean talks on the North’s plan to send an art troupe to the South during the PyeongChang Winter Olympics. (Yonhap)

Former President Lee Myung-bak speaks during a press conference at his office in Seoul on Jan. 17, 2018. Lee strongly protested prosecutors’ investigation of his former aides, denouncing it as “political retaliation” and urging prosecutors to take him on directly without harassing aides. (Yonhap)

Chan Mi, a member of South Korean girl group AOA, carries the torch for the Feb. 9-25 PyeongChang Winter Olympics in Seoul on Jan. 16, 2018, as part of a nationwide 2,018-kilometer relay tour. (Yonhap)

South Korean Foreign Minister Kang Kyung-wha (L) shakes hands with Canadian Foreign Minister Chrystia Freeland as they meet in Vancouver on Jan. 15, 2018, on the sidelines of a two-day gathering of top diplomats from 16 countries. The gathering is for discussing issues related to security and stability on the Korean Peninsula. (Yonhap)

The top part of the cauldron for the PyeongChang Winter Olympics at Olympic Plaza in PyeongChang, some 180 kilometers east of Seoul, is veiled on Jan. 12, 2018, less than a month before the Feb. 9 opening of the quadrennial sports event. (Yonhap)

This satellite image, provided by U.S. research monitoring website 38 North on Jan. 11, 2018, shows the nuclear test site in the Punggyeri region in North Korea on Dec. 28, 2017. The website claimed North Korea has carried out significant tunneling on the west side of its main nuclear test site, saying these activities underscore Pyongyang’s continued efforts to maintain the site’s potential for future nuclear testing. (Yonhap)