"The National Security Agency is searching the contents of vast amounts of Americans’ e-mail and text communications into and out of the country, hunting for people who mention information about foreigners under surveillance, according to
“The National Security Agency is searching the contents of vast amounts of Americans’ e-mail and text communications into and out of the country, hunting for people who mention information about foreigners under surveillance, according to intelligence officials.”
See the full article: NSA Said to Search Content of Messages to and From U.S.(New York Times, link)
And see Statewatch Observatory: EU-USA Data Surveillance