A US soldier has sparked a major diplomatic incident by deliberately crossing the border into North Korea. Travis King had been stationed in South Korea and was about to be flown back home after being detained on assault charges. But once his military escort had got him to the airport and seen him off through customs, he did a sneaky backtrack and joined a tour group heading to the famous demilitarised zone (DMZ) between South and North Korea. It could get very tricky very quickly for US President Joe Biden if the unpredictable North Korean leader Kim Jong Un tries to use King as a bargaining chip. And as if things were not already tense enough on the Korean Peninsula… An American nuclear-armed submarine has just arrived for a *friendly* visit, with the North retaliating by firing two ballistic missiles. Yikes…