 Complete the following phrase:  Despite the Sunshine Policy and efforts at reconciliation, the progress was complicated by North Korean missile tests in 1993, 1998, 2006, 2009, and 2013. By early 2009, relationships between North and South Korea were very tense; North Korea had been reported to have deployed missiles, ended its former agreements with South Korea, and threatened South Korea and the United States not to interfere with a satellite launch it had planned. North and South Korea are still technically at war having never signed a peace treaty after the Korean War and share the worlds most heavily fortified border. On 27 May 2009, North Korean media declared that the Armistice is no longer valid because of the South Korean governments pledge to definitely join the Proliferation Security Initiative. To further complicate and intensify strains between the two nations, the 