China Sea. They were rescued by elements of the ROK Navy. Neither soldier wished to defect, so they were returned to North Korean control through Panmunjom. Operation Bobby Hall, December 29, 1994 In December 1994 an unarmed OH-58 Kiowa helicopter from the US Army crossed the MDL while undertaking a low-altitude flight over hilly, wooded terrain in South Korea. KPA air defense forces shot the aircraft down as it was returning to South Korean-controlled territory. Co-pilot David M. Hilemon was killed but pilot Bobby Hall was released 13 days later after signing an apology for "accidentally straying" into North Korean airspace. 2010s In August 2010, Reverend Han Sang-ryol of South Korea, who had entered and stayed in North Korea for two months in order to promote his cause of Korean unification, was arrested by South Korean authorities after returning to South Korea through the Joint Security Area. In March 2012, South Korean unification activist Ro Su-hui entered North Korea in order to promote his cause of Korean unification. In July, he was arrested by South Korean authorities, after returning to South Korea through the Joint Security Area. In June 2013, initial talks to prepare for higher-level negotiations were held in the JSA. These were the first working-level talks held in the JSA since February 2011. No ministerial-level talks have been held at the JSA since 2007. In November 2017, Oh Chong-song, a North Korean soldier, defected by crossing the demarcation line in the JSA. The soldier drove a vehicle until it became stuck on the north side of the border. The defector then jumped out and was shot by other KPA soldiers and was found in critical condition with multiple gun wounds about from the demarcation line. He survived. In January 2018, North Korea and South Korea met on the South Korean side of the JSA at the Inter-Korean Peace House to discuss North Korea's participation in the 2018 Winter Olympics including a possible inter-Korean women's ice hockey team and North Korea's participation in ice skating pairs. On April 27, 2018, the 2018 inter-Korean summit took place. North Korean leader Kim Jong-un shook hands with South Korean President Moon Jae-in and crossed over the MDL, marking the first time a North Korean leader has set foot in Southern territory since the Korean War ended in 1953. Both men held hands and crossed back over to the North briefly before returning