
A B-1B Lancer bomber (L) deployed by the U.S. military and two South Korean F-15K fighters fly over Osan Air Base, south of Seoul, on Sept. 21, 2016, in this photo released by the South Korean Air Force. The bomber is one of the two B-1B Lancer bombers that the United States deployed the same day from Guam to show its strong commitment to its key Asian ally amid evolving threats from North Korea. It marks the first time for a B-1B Lancer bomber to have made a landing in South Korea. (Yonhap)

People wait to leave Seoul Station in downtown Seoul on Sept. 17, 2016 as the Chuseok holiday draws to a close. Chuseok, the Korean thanksgiving which fell on Sept. 15 this year, is the season for family reunions, with Koreans traditionally offering a ritual feast to their ancestors. [Yonhap]

A trail is flooded by heavy rains in South Korea’s southern port city of Busan on Sept. 17, 2016. The southern region has been affected by the influence of Typhoon Malakas that is headed northward with strong gusts. The country’s weather service, Korea Meteorological Administration, issued advisories or warnings for a number of southern cities, including Ulsan and Busan. (Yonhap)

South Korean National Assembly Speaker Chung Se-kyun (front row, 2nd from R) pays tribute at the Korean War Veterans Memorial in Washington, D.C., on Sept. 12, 2016, during his visit to the United States, in this photo provided by the parliament. Chung is to hold talks with U.S. parliamentary leaders to discuss ways to cooperate amid heightened tensions caused by North Korea’s latest nuclear test. (Yonhap)

Members of South Korean girl group DIA pose for a photo during an event to mark the release of its third album, “Spell,” at a performance center in Seoul on Sept. 12, 2016. (Yonhap)

In this aerial photo taken on Sept. 13, 2016, hundreds of cars are backed up at a service station exit in Anseong, south of Seoul, along a highway linking Seoul to the port city of Busan, as South Korea’s annual exodus for the Chuseok fall holiday begins. Chuseok, which falls on Sept. 15 this year, is the season for family reunions, with Koreans traditionally offering a ritual feast to their ancestors on Aug. 15 of the lunar calendar. Almost 37.52 million people are expected to travel to their home towns during the holiday. (Yonhap)

A traditional market in Seongnam, southeast of Seoul, is crowded with people on Sept. 9, 2016, who shop ahead of Chuseok, the Korean equivalent of Thanksgiving that falls on Sept. 15 this year. (Yonhap)

An official checks radiation levels at a checking facility of the state-run Korea Institute of Nuclear Safety in Gangneung on South Korea’s east coast on Sept. 9, 2016, to see if the area has been contaminated by radioactive material. Earlier in the day, North Korea confirmed its fifth nuclear test, which Seoul blasted as an “intolerable provocation.” (Yonhap)

A towed artillery piece fires as reservists and soldiers from the South Korean Army’s 1st Corps conduct a live-fire exercise at a range in Paju, north of Seoul, bordering North Korea, on Sept. 8, 2016. (Yonhap)

A customer looks at a “Mudeungsan” watermelon (R) and an ordinary one at the Daegu Department Store in the name sake city on Aug. 26, 2016. Mudeungsan watermelon, which was an offering to the king during the Joseon Dynasty (1392-1910), sells for 200,000 won (US$180). Gwangju, 329 kilometers south of Seoul, is the origin of the watermelon. The department store provided this photo) (Yonhap)