Question: when did the country now owning Kaesong conduct its first nuclear test?

full_context: Document 1: Korean Armistice Agreement: The Korean Armistice Agreement is the armistice which serves to ensure a complete cessation of hostilities of the Korean War. It was signed by U.S. Army Lieutenant General William Harrison, Jr. representing the United Nations Command (UNC), North Korean General Nam Il representing the Korean People's Army (KPA), and the Chinese People's Volunteer Army (PVA). The armistice was signed on July 27, 1953, and was designed to ``insure a complete cessation of hostilities and of all acts of armed force in Korea until a final peaceful settlement is achieved. ''No`` final peaceful settlement'' has been achieved. The signed armistice established the Korean Demilitarized Zone (de facto a new border between the two nations), put into force a cease - fire, and finalized repatriation of prisoners of war. The Demilitarized Zone runs not far from the 38th parallel, which separated North and South Korea before the Korean War.
Document 2: Korean War: In 1952, the United States elected a new president, and on 29 November 1952, the president-elect, Dwight D. Eisenhower, went to Korea to learn what might end the Korean War. With the United Nations' acceptance of India's proposed Korean War armistice, the KPA, the PVA, and the UN Command ceased fire with the battle line approximately at the 38th parallel. Upon agreeing to the armistice, the belligerents established the Korean Demilitarized Zone (DMZ), which has since been patrolled by the KPA and ROKA, United States, and Joint UN Commands.
Document 3: 2006 North Korean nuclear test: The 2006 North Korean nuclear test was the detonation of a nuclear device conducted by North Korea on October 9, 2006.
Document 4: List of nuclear weapons tests of North Korea: Nuclear tests Information Country North Korea Test site Punggye - ri Nuclear Test Site, North Korea Period 2006 -- present Number of tests 6 Test type underground Max. yield ~ 140 kt (U.S. intelligence) 160 kt (Revised estimates from Japanese Government) 250 kt (38 North and revised NORSAR estimate)
Document 5: Korean War: The on-again, off-again armistice negotiations continued for two years, first at Kaesong, on the border between North and South Korea, and then at the neighbouring village of Panmunjom. A major, problematic negotiation point was prisoner of war (POW) repatriation. The PVA, KPA, and UN Command could not agree on a system of repatriation because many PVA and KPA soldiers refused to be repatriated back to the north, which was unacceptable to the Chinese and North Koreans. In the final armistice agreement, signed on 27 July 1953, a Neutral Nations Repatriation Commission, under the chairman Indian General K. S. Thimayya, was set up to handle the matter.
Document 6: List of states with nuclear weapons: Country Warheads (Deployed / Total) Date of first test Test site of first test CTBT status Delivery methods Number of tests The five nuclear - weapon states under the NPT United States 1,800 / 6,800 16 July 1945 (``Trinity '') Alamogordo, New Mexico Signatory Nuclear triad 1,054 Russia 1,950 / 7,000 29 August 1949 (`` RDS - 1'') Semipalatinsk, Kazakhstan Ratifier Nuclear triad 715 United Kingdom 120 / 215 3 October 1952 (``Hurricane '') Monte Bello Islands, Australia Ratifier Sea - based 45 France 280 / 300 13 February 1960 (`` Gerboise Bleue'') Sahara, French Algeria Ratifier Sea - and air - based 210 China? / 270 16 October 1964 (``596 '') Lop Nur, Xinjiang Signatory Suspected nuclear triad. 45 Non-NPT nuclear powers India 0 / 110 -- 120 18 May 1974 (`` Smiling Buddha'') Pokhran, Rajasthan Non-signatory Nuclear triad 6 Pakistan 0 / 120 -- 130 28 May 1998 (``Chagai - I '') Ras Koh Hills, Balochistan Non-signatory Land and air - based. 6 North Korea 0 /? 9 October 2006 Kilju, North Hamgyong Non-signatory Suspected land and sea - based. 6 Undeclared nuclear powers Israel n.a. / est. 60 -- 400 1960 -- 1979 incl. suspected Vela Incident Signatory Suspected nuclear triad.
Document 7: Nuclear weapons testing: Underground tests in the United States continued until 1992 (its last nuclear test), the Soviet Union until 1990, the United Kingdom until 1991, and both China and France until 1996. In signing the Comprehensive Nuclear - Test - Ban Treaty in 1996, these states have pledged to discontinue all nuclear testing; the treaty has not yet entered into force because of failure to be ratified by eight countries. Non-signatories India and Pakistan last tested nuclear weapons in 1998. North Korea conducted nuclear tests in 2006, 2009, 2013, 2016, and 2017. The most recent confirmed nuclear test occurred in September 2017 in North Korea.
Document 8: North Korea and weapons of mass destruction: North Korea has a military nuclear weapons program and also has a significant quantity of chemical and biological weapons. As of 2003, North Korea is no longer a party to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). The country has come under sanctions after conducting a number of nuclear tests, beginning in 2006.
Document 9: Panmunjom: A final armistice agreement was reached on July 27, 1953. The United Nations Command, Chinese Peoples Liberation Army, and North Korea Peoples Army agreed to an armistice ending the fighting. The agreement established a 4-kilometer-wide demilitarized zone along the armistice line, effectively dividing Korea into two separate countries. Although most troops and all heavy weapons were to be removed from the area, it has been heavily armed by both sides since the end of the fighting.
Document 10: Korean War: For the remainder of the Korean War the UN Command and the PVA fought, but exchanged little territory; the stalemate held. Large - scale bombing of North Korea continued, and protracted armistice negotiations began 10 July 1951 at Kaesong. On the Chinese side, Zhou Enlai directed peace talks, and Li Kenong and Qiao Guanghua headed the negotiation team. Combat continued while the belligerents negotiated; the UN Command forces' goal was to recapture all of South Korea and to avoid losing territory. The PVA and the KPA attempted similar operations, and later effected military and psychological operations in order to test the UN Command's resolve to continue the war.
Document 11: Marshall Islands: During the early years of the Cold War from 1946 to 1958, the United States tested 67 nuclear weapons at its Pacific Proving Grounds located in the Marshall Islands, including the largest atmospheric nuclear test ever conducted by the U.S., code named Castle Bravo. "The bombs had a total yield of 108,496 kilotons, over 7,200 times more powerful than the atomic weapons used during World War II." With the 1952 test of the first U.S. hydrogen bomb, code named "Ivy Mike," the island of Elugelab in the Enewetak atoll was destroyed. In 1956, the United States Atomic Energy Commission regarded the Marshall Islands as "by far the most contaminated place in the world."
Document 12: 2008 Summer Olympics torch relay: North Korea: The event was held in Pyongyang on April 28. It was the first time that the Olympic torch has traveled to North Korea. A crowd of thousands waving pink paper flowers and small flags with the Beijing Olympics logo were organized by the authoritarian regime watched the beginning of the relay in Pyongyang, some waving Chinese flags. The event was presided over by the head of the country's parliament, Kim Yong Nam. The North, an ally of China, has been critical of disruptions to the torch relay elsewhere and has supported Beijing in its actions against protests in Tibet. Kim passed the torch to the first runner Pak Du Ik, who played on North Korea's 1966 World Cup soccer team, as he began the 19-kilometre route through Pyongyang. The relay began from the large sculpted flame of the obelisk of the Juche Tower, which commemorates the national ideology of Juche, or "self-reliance", created by the country's late founding President Kim Il Sung, father of leader Kim Jong Il, who did not attend.
Document 13: Nuclear weapon design: The picture below shows the Shrimp device, detonated on March 1, 1954 at Bikini, as the Castle Bravo test. Its 15-megaton explosion was the largest ever by the United States. The silhouette of a man is shown for scale. The device is supported from below, at the ends. The pipes going into the shot cab ceiling, which appear to be supports, are actually diagnostic light pipes. The eight pipes at the right end (1) sent information about the detonation of the primary. Two in the middle (2) marked the time when x-radiation from the primary reached the radiation channel around the secondary. The last two pipes (3) noted the time radiation reached the far end of the radiation channel, the difference between (2) and (3) being the radiation transit time for the channel.
Document 14: Korean War: The Demilitarized Zone runs northeast of the 38th parallel; to the south, it travels west. The old Korean capital city of Kaesong, site of the armistice negotiations, originally was in pre-war South Korea, but now is part of North Korea. The United Nations Command, supported by the United States, the North Korean People's Army, and the Chinese People's Volunteers, signed the Armistice Agreement on 27 July 1953 to end the fighting. The Armistice also called upon the governments of South Korea, North Korea, China and the United States to participate in continued peace talks. The war is considered to have ended at this point, even though there was no peace treaty. North Korea nevertheless claims that it won the Korean War.
Document 15: Korean War: In 1952, the United States elected a new president, and on 29 November 1952, the president - elect, Dwight D. Eisenhower, went to Korea to learn what might end the Korean War. With the United Nations' acceptance of India's proposed Korean War armistice, the KPA, the PVA, and the UN Command ceased fire with the battle line approximately at the 38th parallel. Upon agreeing to the armistice, the belligerents established the Korean Demilitarized Zone (DMZ), which has since been patrolled by the KPA and ROKA, United States, and Joint UN Commands.
ground_truth: October 9, 2006
sub_queries: Where is the capital city of Kaesong now located? Answer: North Korea
when did North Korea conduct its first nuclear test Answer: October 9, 2006