What are nerve agents like Novichok and how do they kill?

Novichok, a highly poisonous chemical, was designed by Russia during the Cold War and made to be undetectable by standard detection equipment. CNN explores how it, and other nerve agents, work.

Novichok, a highly poisonous chemical, was designed by Russia during the Cold War and made to be undetectable by standard detection equipment. CNN explores how it, and other nerve agents, work.