Data centers also enable the NSA to store the metadata and contents of every phone call you make and police to (without a warrant) to track anyone who's walked in front of your doorbell or many street corners in your city. They also store all the location data your phone collects for Google or Apple, nearly your entire internet history collected surreptitiously because many sites automatically use your GMail or Facebook logins, and your entire purchase history collected via Visa or MasterCard.

And even better: all of that data is aggregated together and stored in its entirety several times over across multiple data centers because everyone shares your data with everyone else, such that if any single of more than a dozen data centers is ever compromised, it all gets leaked to whomever compromised it.