North Korea tensions: Why is Kim Jong-un upping the pressure?

OCT 26: Over the past month the North has fired a missile over Japan, forcing residents to seek shelter; a hostile and provocative act. It has launched several other ballistic missiles, flown warplanes close to its border with South Korea and fired hundreds of shells of artillery into the sea, which have landed in a military buffer zone, created by the two Koreas in 2018 to keep peace. The two countries are technically still at war.

On Monday a North Korean merchant ship crossed the countries' sea border, causing both sides to fire warning shots. South Korea says the incursion was intentional.