See http://www.bbc.co.uk/news/world-europe-29686756 .
It sounds like the stuff of spy novels from many years ago, but the Swedish military may indeed be hunting a Russian sub in the waters not far from Stockholm. Neutral Sweden? Why? It beggars belief that the Russians would want to bother with Sweden.
If they do this with Sweden, you can only imagine the spying going on between the Russians and the USA for example.
Russia - the cold war ended a nearly a quarter of a century back! This is the 21st century, remember? Major nations try to behave like adults nowadays. It saddens me to think some major world players still play war games. I expect the USA and the UK are just as bad.