Background
The following document was requested to have a Mandatory Declassification Review (MDR) in January of 2017.
It was then reviewed and released in March of 2018.
Document Archive
SIGINT and IBS 2014 Briefing for U.S. Northern Command [27 Pages, 2.9MB]
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https://documents.theblackvault.com/documents/nsa/SIGINT-IBSBriefing.pdf
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