Euro 2016: Fan Zone security exercise in Lyon In order to test the coordination between various emergency services, a last security exercise before the start of the Euro 2016 is held Tuesday evening, simulating a terrorist attack at the Fan Zone in Lyon. Four hundred and fifty rescue workers and security forces participated in this "worst case scenario" according to the prefect of Rhone, in the area that can hold up to 25,000 supporters. IMAGES AND SOUNDBITES