According to an overnight statement by the Malaysian police, Kim Jong Nam—half-brother of North Korean leader Kim Jong Un—was assassinated with the nerve agent VX at Kuala Lumpur International Airport.
VX is one of the high-end chemical warfare agents developed and produced in large quantities by the USA, USSR and some secondary powers during the cold war. Former military chemical weapon arsenals are being eliminated under the Chemical Weapons Convention. The Democratic People’s Republic of Korea (DPRK), of course, is together with Egypt, Israel and South Sudan one of the four hold-out states. It is widely believed to have a significant chemical warfare capacity, but how militarily effective it might be is anyone’s guess.