submarine. May 29 – President Lee Myung-bak, Chinese Premier Wen Jiabao, and Japanese Prime Minister Yukio Hatoyama meet in Jeju in a trilateral summit to discuss strengthening trade ties and the effects of the Cheonan incident. June June 2 – The 2010 South Korean local elections are held. June 2 – The South Korean government announces that it will spend 11.3 billion won (US$9.3 million) until 2013 to support research on key three-dimensional 3D TV technologies. June 10 – The second launch of Naro-1 ends in failure after 137 seconds when the rocket explodes and contact is lost. June 22 – The South Korea national football team qualifies for the knockout stages of the 2010 World Cup with 4 points, winning 2–0 against Greece, losing 4–1 to Argentina, and drawing 2–2 with Nigeria. July July 1 – The historical cities of Masan, Changwon, and Jinhae, merge to create the Unified Changwon City, with a population of 1.04 million. July 9 – The Bank of Korea unexpectedly raises interest rates from 2% to 2.25%. July 26 – South Korea and the United States begin navy and air force maneuvers in the Sea of Japan (East Sea) with intent to "rattle" North Korea. July 28 – Grand National Party wins five out of eight seats in National Assembly by-elections. July 29 – Prime Minister Chung Un-chan offers his resignation. August August 1 – South Korea women's national under-20 football team beats Colombia 1–0 in the third-place match. August 9 – North Korea fires over 100 rounds of artillery into the Sea of Japan. August 10 – Chung Un-Chan officially resigns. The Prime Minister of Japan Naoto Kan apologizes to South Korea for the colonization of the Korean peninsula in the early 1900s. August 11 – Typhoon Dianmu strikes in the Southern Korean Peninsula. August 15 – Gwangbokjeol, Restoration work on the Gwanghwamun finishes and is revealed to the public. August 16 – The Republic of Korea Armed Forces and the United States armed forces ignore warnings from North Korea, and start a new round of the Ulchi-Freedom Guardian drills in South Korea. September September 2 – Typhoon Kompasu strikes on the west coast of the Korean Peninsula. September 4 – Yu Myung-hwan resigns as Minister for Foreign Affairs and Trade amid accusations of nepotism after his daughter is hired to a mid-level position in his Ministry. September 13 – An independent investigation