North Korean leader Kim Jong Un has overseen drills simulating a nuclear counterattack against the U.S. and South Korea in a warning to the allies who are scaling up their joint military exercises, state media KCNA said on Monday.
The North's drills involved a short-range missile launch but - unusually - the missile flew from a buried silo, which analysts say would help improve speed and stability in future tests of intercontinental ballistic missiles (ICBM).
