The Washington Post has released four previously unpublished slides from the NSA's PowerPoint presentation on Prism, the top-secret programme that collects data on foreign surveillance targets from the systems of nine participating internet companies. The newly published top-secret documents, which the newspaper has released with some redactions, give further details of how Prism interfaces with the nine companies, which include such giants as Google, Microsoft and Apple. According to annotations to the slides by the Washington Post, the new material shows how the FBI "deploys government equipment on private company property to retrieve matching information from a participating company, such...