Three things to know about deadly VX
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Three things to know about deadly VX

Kim Jong-nam, the half-brother of North Korea's leader, was killed by a nerve agent, police say.

Police in Malaysia say that a powerful nerve agent, VX, appears to have been used in the murder of the half-brother of North Korean leader, Kim Jong-Un.

The BBC's Rupert Wingfield-Hayes explains.

  • 24 Feb
  • From the section Asia