Demonstrators hold a placard reading 'Free Tuna Altinel' during a demonstration outside the courthouse of Balikesir, on July 30, 2019, prior to the trial of Turkish mathematician Tuna Altinel. - Tuna Altinel, who teaches at Lyon University, faces two trials for supporting peace initiatives with Kurdish insurgents. His trial for "terrorist propaganda" opened on July 16. (Photo by Yasin AKGUL / AFP)