2018–20 Korean peace process  The 2018–20 Korean peace process was initiated in order to resolve the long-term Korean conflict and denuclearize the Korean peninsula. International concern about North Korea's nuclear weapons came to a head in 2017. A series of summits were held between North Korea's Kim Jong-un, South Korea's Moon Jae-in, and Donald Trump of the United States. Trump became the first sitting US President to meet a North Korean leader. Moon became the first South Korean President to give a speech in North Korea. In parallel to this, a number of cultural exchanges began. In 1945, at the end of World War II, Korea was divided. In 1950, war broke out between North and South Korea. The United States intervened to defend the South and has continued a military presence to the present day. A cease fire ended the fighting in 1953, but no official peace treaty has been signed. Frequent clashes have occurred between both sides to this day. At the end of the Cold War, North Korea lost its supporters in the Soviet Bloc. In December 1991 North and South Korea made an accord, the Agreement on Reconciliation, Non-Aggression, Exchange and Cooperation, pledging non-aggression and cultural and economic exchanges. They also agreed to prior notification of major military movements and established a military hotline, and to work on replacing the armistice with a "peace regime". In 1994, concern over North Korea's nuclear program led to the Agreed Framework between the US and North Korea. In 1998, South Korean President Kim Dae-jung announced a Sunshine Policy towards North Korea. An Inter-Korean summit was held in 2000. Continuing concerns about North Korea's development of nuclear missiles led in 2003 to the six-party talks that included North Korea, South Korea, the US, Russia, China, and Japan. In 2006, however, North Korea resumed testing missiles and on October 9 conducted its first nuclear test. A second inter-Korean summit was held in 2007. By 2017, estimates of North Korea's nuclear arsenal ranged between 15 and 60 bombs, probably including hydrogen bombs. In the opinion of analysts, the Hwasong-15 missile is capable of striking anywhere in the United States. There was an increase in militaristic rhetoric on both sides. In May 2017 Moon Jae-in was elected President of South Korea with a promise to return to the Sunshine Policy. In his New Year address for 2018, North Korean leader, Chairman of the Workers' Party of Korea Kim Jong-un proposed sending a delegation to the upcoming Winter Olympics in South Korea.