North, South Korea sever ties: war gamers watch for signs

North and South Korea continued to trade diplomatic blows on Tuesday, with South Korea re-designating the North their “principal enemy,” a term that Seoul used to use for Pyonyang, but then retired in 2004. North Korea retaliated by cutting ties with the South, calling southern officials “puppet authorities.” Brian Myers, professor of international studies at Dongseo University in South Korea, joins us from the ground with a look at the latest news.

And one group of people keeping a particularly close eye on the developing situation between North and South Korea: war gamers. Observers, analysts and former military leaders who have “gamed” out what might happen if certain scenarios were to become reality. Ret. Col. Sam Gardiner has conducted war games about North Korea, and says what the U.S. and South Korea should fear most is the use of North Korea’s chemical, biological and nuclear weapons. “[North Korea] has a sword hanging over us that has a very sharp blade,” Gardiner says.