How the NSA's MUSCULAR program collects too much data from Yahoo and Google

http://apps.washingtonpost.com/g/page/world/how-the-nsas-muscular-program-collects-too-much-data-from-yahoo-and-google/543/

This document is an excerpt from Special Source Operations Weekly, an internal National Security Agency publication dated March 14, 2013. It describes a common NSA problem of collecting too much information – and how the agency is attempting to control it.