North Korea's Nuclear-Capable Underwater Drone Raises Concerns.

North Korea has claimed to have tested a nuclear-capable underwater attack drone called "Haeil," which can launch a "radioactive tsunami" to destroy naval strike groups or enemy ports. The test was the latest in a series of simulated attacks as Pyongyang escalated its nuclear threats while the United States and South Korea held joint military exercises. Analysts were skeptical about the extent of any new threat, but said the claims showed North Korea's determination to showcase growing capabilities in order to strengthen its hand in dealing with the West. The test was overseen by Kim Jong Un, who expressed his will to make the U.S. and South Korea "plunge into despair."