In the news

http://www.theguardian.com/world/2013/sep/30/nsa-americans-metadata-year-documents

The Obama administration has repeatedly stated that the NSA keeps only the content of messages and communications of people it is intentionally targeting – but internal documents reveal the agency retains vast amounts of metadata.

Of course they do. Its probably easier to store everyones metadata than sift it limiting it to people they are targetting. They will just ask Google,, yahoo FB etc and isps to hand over everything

Also I bet its not just metadata they hold...it's everything