The National Security Agency has developed technology that allows it to track cellphones even when they are powered off, Ryan Gallagher writes, citing a Washington Post article. The agency reportedly deployed the technology in Iraq as part of the U.S. military's counterinsurgency effort, although the technique is unclear. The report means civil liberties groups are likely to want to further investigate the NSA's claim that it does not include location data on the millions of phone calls it stores in its database, Gallagher writes.

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