The Nerve Agent Poisoning in England Was a Message to the Rest of the World
theverge.com
theverge.com
Their message is pretty clear: they can cause mass civilian casualties anywhere they want, and probably get away with it. So it's best not to push Russia too hard.
I thought that applies even more to the USA running assassination programs[0] in over 76 countries now.
[0]: http://www.nybooks.com/articles/2016/08/18/the-drone-preside...