Could this lead to war? Travis King disappears into North Korea as tensions rise on the peninsula. Kim Jong-un talks of revenge but experts disagree about what he will do next.
American soldier bolts into enemy territory
Lost: Travis King has not been heard from since he ran across the border into North Korea. Glossary
North Korea - A country formed in 1945 when Japanese-occupied Korea was split between a Communist government in the north and a capitalist one in the south. Today it is extremely reclusive, and hostile to the West.
Kim Jong-un - The leader of North Korea since 2011.
Embassy - The workplace of a group of government officials who represent their country in another country.
Rally - A big meeting of people to support a cause.
Pyongyang - The capital and largest city of the Democratic People's Republic of Korea (DPRK), commonly known as North Korea. It is the country's political, industrial and transport centre, with about 2,750,000 inhabitants.
Vancouver - A city on the west coast of Canada which is consistently named as one of the best places in the world to live.