FILE - In this Sunday, April 15, 2012 file photo, a North Korean vehicle carries a missile during a mass military parade in Pyongyang's Kim Il Sung Square to celebrate the centenary of the birth of the late North Korean founder Kim Il Sung. Though it remains a highly unlikely scenario, Japanese officials have long feared that if North Korea ever decides to play its nuclear card it has not only the means but several potential motives for launching an attack on Tokyo or major U.S. military installations on Japan's main island. And while a conventional missile attack is far more likely, Tokyo is taking North Korea's nuclear rhetoric seriously. (AP Photo/David Guttenfelder, File)
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