North Korea: A Fifth Nuclear Test?

North Korea appeared to carry out its fifth underground nuclear test on Sept. 9, coinciding with the 68th anniversary of the founding of the Democratic People's Republic of Korea. The test occurred less than a day after U.S. President Barack Obama left Asia following his attendance at the G-20 and Association of Southeast Asian Nations summits. The test also follows by a few days the most recent series of North Korean Rodong medium-range ballistic missile tests. According to initial reports, a 5.3 magnitude earthquake was detected near the site of North Korea's previous nuclear tests. The seismic signature is similar to previous North Korean tests. ...