between the united states and north korea, separated by 7,000 miles. And tonight, a new warning from the mysteriousination, claiming they are ready to show the world their mite, possibly another test... See More
between the united states and north korea, separated by 7,000 miles. And tonight, a new warning from the mysteriousination, claiming they are ready to show the world their mite, possibly another test of another weapon. Tonight abc's chief global affairs correspondent martha raddatz is on the tense and watchful border once again in seoul, south korea. Reporter: Good evening, diane. Officials tell abc news that it appears north korea is on the verge of testing a missile. Exactly the kind of move that could create a chain reaction in an area here that's not seen this much tension in years. Tonight the u.S. Is tracking a mobile missile launcher that has been moved within north korea by train. The launcher has the ability to strike japan as well as u.S. Bases in okinawa and guam. Adding to the fears, today, the young leader of the north said, "the moment of explosion is coming." Reporter: North korea's newsreaders promising a justified all-out war. Where here in south korea today, u.S. Forces trained in hazmat suits. It is preparation in the unlikely event kim jong-un were to deploy his nation's arsenal of chemical weapons. One of the largest stockpiles in the world. But the only attack so far, a hacker on north korea's flicker site. Yes, they have a flicker photo site. Placing a pig-like snout on kim jong un's face, and a mickey mouse on his chest. No one really believes north korea will launch a nuclear or chemical attack, but if they test that mobile missile, and there's damage, either on purpose or by mistake, there will, no doubt, be a response.
This transcript has been automatically generated and may not be 100% accurate.