investigators found vx on kim jong-nam's face and eyes. the nerve agent is so deadly, a tiny drop can kill you. it causes your muscles to spasm and impossible to breathe. vx is banned under the 1993 chemical weapons convention. but north korean scientists probably produced it in a sophisticated state weapon's lab. president trump's daughter, ivanka is taking part in many roles in the white house even though she has no formal role. so what exactly is the first daughter doing there? that's next.