Approximately 200 South Koreans and their family members crossed into North Korea to meet with relatives most haven't seen since they were separated during the Korean War.
Here are some reunions, more than six decades later.
MOUNT KUMGANG, NORTH KOREA - AUGUST 20: A 92-year-old South Korean woman hugs her 71-year-old North Korean son during the 21st reunion of the family members separated by the North South Korean border on August 20, 2018 in Mount Kumgang, North Korea. Eighty-nine South Koreans attended the 21st reunion to see their long-lost relatives from Democratic People's Republic of Korea (DPRK) at Mount Kumgang on Monday. (Photo by Inter-Korean Summit Press Corps/China News Service/VCG via Getty Images)