Missile vs missile: North Korea and South Korea enter test duel

North Korea and South Korea test fired ballistic missiles on Wednesday, the latest volley in an arms race. South Korea tested a submarine-launched ballistic missile, becoming the first country without nuclear weapons to develop such a system.
 
South Korean President Moon was attending that test firing when word came of the North Korean launches, its first ballistic missile tests since March. North Korea fired a pair of ballistic missiles that landed in the sea off its east coast, according to officials in South Korea and Japan, just days after it tested a cruise missile.
 
Japan's defence ministry said