What poison could have killed Kim's brother?

[Wireless News]

http://l.yimg.com/uu/api/res/1.2/ySsF7pDLjAe9nItv26LZKg--/YXBwaWQ9eXRhY2h5b247aD04Njt3PTEzMDs-/http://media.zenfs.com/en_us/News/afp.com/8c76f452be7e38938f59422f19d5a919c7cbe789.jpg (https://www.yahoo.com/news/poison-could-killed-kims-brother-162401638.html)The assassination of the North Korean leader's half-brother saw Kim Jong-Nam collapse shortly after two women shoved a cloth in his face. A. I don't know of a toxin powerful enough to act by penetrating the skin that would kill so quickly.



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