| web | http://www.spiegel.de/international/world/the-nsa-uses-powerful-toolbox-in-effort-to-spy-on-global-networks-a-940969.html |
| author | Spiegel Staff |
| publication | Spiegel Online |
| date | 2013-12-29 |
| web | Katie Long | Slate | 2013-12-29 |
| web | Jacob Appelbaum, Judith Horche... | Spiegel Online | 2013-12-29 |
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