XKeyscore

[How the NSA's XKeyscore program works (nbcnews.com)](https://www.nbcnews.com/technolog/how-nsas-xkeyscore-program-works-6C10812168)

"The XKeyscore system is continuously collecting so much Internet data that it can be stored only for short periods of time," the Guardian said. "Content remains on the system for only three to five days," while [metadata ](http://www.nbcnews.com/technology/big-brother-may-not-be-listening-hes-watching-why-metadata-6C10334990?franchiseSlug=technolog)— the data behind the data, information like email headers or the location from where you last access your email "is stored for 30 days. One document explains: 'At some sites, the amount of data we …

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