The information was based on a secret map and other documents which are among the stockpile of information offloaded by Edward Snowden from the National Security Agency servers where he worked there as a contractual employee in the IT department.
Ang impormasyon ay batay sa isang sikretong mapa at iba pang dokumento na kabilang sa mga bungkos ng impormasyong kinuha ni Edward Snowden mula sa server ng National Security Agency ng US kung saan siya nagtrabaho bilang kontraktwal sa IT department nito.