Cómo Obama vigila a Internet.

NSA slides explain the PRISM data-collection program.

Through a top-secret program authorized by federal judges working under the Foreign Intelligence Surveillance Act (FISA), the U.S. intelligence community can gain access to the servers of nine Internet companies for a wide range of digital data. Documents describing the previously undisclosed program, obtained by The Washington Post, show the breadth of U.S. electronic surveillance capabilities in the wake of a widely publicized controversy over warrantless wiretapping of U.S. domestic telephone communications in 2005. These slides, annotated by The Washington Post, represent a selection from the overall document, and certain portions are redacted.

Introducing the program

A slide briefing analysts at the National Security Agency about the program touts its effectiveness and features the logos of the companies involved.

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