To which country do the Rodong-1 missiles bring the most threat? [originaltext]

North Korea continues to refuse more negotiations about their nuclear weapons and ballistic missile programs. Satellite photos indicate that North Korea appears to be preparing another test of its Rodong-1 missiles. With a range of 1,200 kilometers, the Rodong-1 can reach targets in Japan, which has caused Japan to spend billions of dollars on American missile defense systems. North Korea is thought to have 100-200 Rodong-1 missiles, which are liquid-fueled, clumsy to prepare for firing and based on World War Ⅱ German missile technology.