NSA 'able to render most efforts at communications security effectively futile'

The Washington Post has another revelation on the basis of leaker Edward Snowden's materials: The National Security Agency is "gathering nearly 5 billion records a day on the whereabouts of cellphones around the world."

The Post further reports: "The NSA’s capabilities to track location are staggering, based on the Snowden documents, and indicate that the agency is able to render most efforts at communications security effectively futile."