Jerusalem is a city with many walls. Some of them are physical, like the Western Wall close to the Temple Mount. The sky above the Temple Mount is defined as a "No-Fly-Zone". It is limited by an invisible technological wall, for example embedded in the navigating system of drones. The anthropologist Hagit Keysar and the photographer Barak Brinker visualized Jerusalem's Aerial Wall. Radio Corax has talked to Hagit Keysar about her project.