32 articles
VX (nerve agent)
VX, also known as VX gas, is a human-made nerve agent among the most toxic known, synthesized in Britain in the early 1950s and used to kill Kim Jong-nam in 2017.
Yellow rain
Yellow rain was a yellow substance reported falling in Laos, Cambodia, and Afghanistan from the mid-1970s to early 1980s, which the US alleged was a Soviet toxin weapon.