[Translation of Der Spiegel Magazine article, July 7, 2013]
Snowden: Normally one is marked as a target because of a Facebook profile or because of your emails. The only place which I personally know where you can become a target without this specific labeling, are jihadist forums….
The target person is completely monitored. An analyst will get a daily report about what has changed in the computer system of the targeted person. There will also be… packages with certain data which the automatic analysis systems have not understood, and so on. The analyst can then decide what he wants to do – the computer of the target person does not belong to them anymore, it then more or less belongs to the U.S. government. –Read the entire interview on Cryptome