The Walls of Madrid (Spanish: cerca de Madrid, tapia de Madrid) are the five successive sets of walls that surrounded the city of Madrid from the Middle Ages until the end of the 19th century.
Japan’s Sigint Ground Stations http://nautilus.org/wp-content/uploads/2015/08/Japan-Sigint-Ground-Stations-online.pdf Pine Gap Sigint satellites http://nautilus.org/wp-content/uploads/2015/10/PG-Sigint-Satellites.pdf Lifting the lid on…