http://www.spiegel.de/international/world/german-intelligence-worked-closely-with-nsa-on-data-surveillance-a-912355.html#ref=rss
SPIEGEL ONLINE - International - Angela Merkel 07/22/2013
http://www.spiegel.de/international/germany/questions-about-deployment-of-us-spy-programs-rock-chancellery-a-912401.html#ref=rss