Kim Jong-nam, North Korean leader Kim Jong-un’s half brother, was assassinated last week by a nerve agent called VX, according to the Malaysian police as reported by the Washington Post. What the heck is VX, and why is it so awful?
During a fierce battle for control of the Iraqi city of Mosul last week, Islamic state fighters set fire to a gigantic sulphur plant. Days later, a plume of sulphur dioxide continues to spread over surrounding areas, darkening skies and making the air toxic to breathe.