In the last two weeks, we have seen developments in the Kim Jong Nam assassination case in Malaysia which resemble a spy movie.

The Malaysian police recently announced that the assassins used the VX nerve agent, a deadly chemical weapon prohibited by the UN, and is further investigating the involvement of the North Korean state.

But Kim Jong Nam is not the only victim of North Korea’s chemical weapons. Since the 1990s, when the first North Koreans began leaving the country in large numbers to flee from famine, they brought with them information about