These fortress-like AT&T buildings are central to a secret NSA program that has monitored billions of communications, documents and sources reveal.

Libya has served as a laboratory for new drone warfare tactics.

A base called VICTORY GARDEN, north of Oslo, secretly captured records of phone calls and emails transmitted between law-abiding Norwegians and their friends, families, or colleagues in foreign countries.

Previously unseen photographs offer a glimpse inside an iconic AT&T building in Manhattan tied to a top-secret NSA spy program.

The NSA has operated a top-secret surveillance program out of an iconic AT&T building in Manhattan, documents indicate.