The NSA‘s Special Source Operations (SSO) branch isn‘t in the business of computer hacking but of cable tapping; its logo shows an eagle flying above the globe and clutching a string of wires in its talons. These taps, each obscured with a codename, are often made deep within the network of telecom providers and often with the cooperation of key executives. But sometimes non-cleared people start raising questions about just what might be going on, as was the case with AT&T whistleblower Mark Klein, who revealed an NSA „secret room“ in San Francisco.

On March 14, 2013, an SSO weekly briefing included a note regarding such a discovery.