First of all, beyond the NSA there is a consortium of 4 countries that collaborate on intelligence, data-mining of social media, and score their findings. The consortium is called GCHQ (Government Communications Headquarters) located in Britain and is the flagship of all cyber transactions as well as telecom transactions.
GCHQ is also known as the four eyes, watching everything and everyone globally without exception, areas more robustly than others, all for unique reasons.