New disclosures and investigations into the activities of the U.S. National Security Agency (NSA) have revealed fresh insights about the targets of cyber-surveillance activities. Among the new revelations are details about some of the target locations for the NSA XKeyscore system, which monitors and collects Internet data. According to a report first published in German on Tagesschau on July 3 and followed up by an English language report on DasErste, Linux users are an area of specific interest for surveillance. The report details rules in the XKeyscore source code that identify visitors to the Linux Journal Website, the Tor Onion Router site as well as the Tails Linux distribution site. NSA's interest in Tor has been previously documented in an October 2013 report.