Lium is a french start-up that helps industrial security and safety teams with protecting their infrastructures from threats and managing more efficiently emergency situations. To do so, Lium provides to its clients a tethered balloon system that is easy-to-use and deployable within few minutes. Thanks to embedded cameras and sensors, security and safety services benefit from a global overview of their industrial area for days, without any discontinuity. Thus, they can supervise and coordinate in a better way the deployed teams, identify people in distress, acquire valuable information and record some video content for later feed-backs.