File photo of the sign outside the National Security Agency building in Fort Meade, Maryland. Photo: AP

US spy agency NSA collected 500 million call records in 2017 – triple the number from 2016

Data collected under new surveillance system US lawmakers approved in 2015 that supposedly limits agency’s ability to collect records in bulk

Topic |   Edward Snowden

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File photo of the sign outside the National Security Agency building in Fort Meade, Maryland. Photo: AP
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