South Korea is accusing North Korea of firing a missile into South Korean waters for the first time since the nations were divided in the 1950s. This came as North Korea launched a total of at least 23 missiles into the sea today. South Korea responded by firing three missiles into waters off North Korea. This all came as the United States and South Korea were carrying out large war exercises involving hundreds of warplanes and thousands of troops. On Tuesday, North Korea warned the U.S. and South Korea would pay “the most horrible price in history” if the war games continued.