France Train Attack Trial

FILE - In this Aug.21, 2015 file photo, a police officer videos the crime scene inside a Thalys train at Arras train station, northern France, after a gunman opened fire with an automatic weapon. An Islamic State operative goes on trial in France on terror charges for appearing on a train with an arsenal of weapons and shooting one passenger in 2015. He was brought down by three American vacationers in an electrifying capture that director Clint Eastwood turned into a Hollywood thriller (AP Photo, File)