Book excerpt looks at NSA's Big Awesome Graph initiative, an attempt to map people's social networks out of an enormous trove of intercepted communications (Barton Gellman/Wired)

Barton Gellman / Wired:
Book excerpt looks at NSA's Big Awesome Graph initiative, an attempt to map people's social networks out of an enormous trove of intercepted communications  —  Edward Snowden revealed the agency's phone-record tracking program.  But thanks to “precomputed contact chaining,” that database was much more powerful than anyone knew.

via Techmeme