By Pacific Standard

Among the snooping revelations of recent weeks, there have been tantalizing bits of evidence that the NSA is tapping fiber-optic cables that carry nearly all international phone and Internet data.

The idea that the NSA is sweeping up vast data streams via cables and other infrastructure—often described as the “backbone of the Internet”—is not new. In late 2005, the New York Times first described the tapping, which began after the September 11, 2001, attacks. More details emerged in early 2006 when an AT&T whistleblower came forward.

But like other aspects of NSA surveillance, virtually everything about this kind of NSA surveillance is highly secret and we’re left with far from a full picture.