You’re right...very interesting.
Poor women will soon die though.
It is notable that the women were kept apart until the very moment of the attack and there has been speculation, so far unconfirmed, that they carried separate components of VX, which only produced lethal effects when combined. Then, their task performed, Siti and Huong casually washed their hands and walked out of the airport.
VX is, in fact, a binary agent (or it can be) - this approach might explain why it took the victim 20 minutes to die. Good grief, they even managed to do rehearsals. Amazing.
Jong Nam must have been well briefed on the likely threats to his life as he was found to have been carrying a dozen vials of nerve agent antidote in a sling bag.
Hmm...something more to add to my travel kit...