Which windowless American buildings are secret AT&T/NSA listening posts?

Just gonna leave this right here:
http://map.norsecorp.com/
(at the time of this posting, it’s offline, but keep trying–it’s the realtime map of hacker attempts/attacks by origin, target, type, IP, and more… worldwide, and typically is only able to display ~3% of the total action; it’s fascinating in a perverse, forensic way)

Kaspersky has something akin:

These folks just track DDoS and it’s not as animatedly cool but…

A roundup: