"The Swiss have a system known as Onyx, based on Echelon, the system originally developed by the British and the Americans. Onyx, like Echelon, uses software to filter the contents of satellite communication for specific search terms. There are Onyx listening posts at Zimmerwald and Heimenschwand, in Canton Bern, and at Leuk in Canton Valais. I spent a week in Heimenschwand, when I was thirteen. Dada."