BERLIN, GERMANY - AUGUST 01: Passengers walk by a security sign warning for a Face recognition area at the Suedkreuz train station on August 1, 2017 in Berlin, Germany. German federal police have started a six-month test at the Suedkreuz station of facial recognition software. Over the past weeks police have asked for volunteers, passengers who frequently use the station, to allow themselves to be photographed and participate in the project. Approximately 275 people responded. The test project will run for the next six months and is designed to help authorities in the fight against terrorism. (Photo by Michele Tantussi/Getty Images)