The National Security Agency says its massive new data center near Salt Lake City will enhance the agency's ability to analyze the email, text message, cellphone and landline metadata it collects. Rick Bowmer/AP hide caption

itoggle caption Rick Bowmer/AP

A promotional image from Renew shows one of its recycling/advertising kiosks in London. City officials asked the company to stop recording data about the phones of passing pedestrians. Renew hide caption

itoggle caption Renew

Protesters demonstrate in Berlin on Tuesday on the eve of President Obama's visit to the German capital. Obama is expected to encounter a more skeptical Germany in talks on trade and secret surveillance practices. Odd Andersen /AFP/Getty Images hide caption

itoggle caption Odd Andersen /AFP/Getty Images