PEPLO, Greece (AP) – As the world begins to travel again, Europe is sending migrants a loud message: Stay away!
Greek border police are firing bursts of deafening noise from an armored truck over the frontier into Turkey. Mounted on the vehicle, the long-range acoustic device, or “sound cannon,” is the size of a small TV set but can match the volume of a jet engine.
It´s part of a vast array of physical and experimental new digital barriers being installed and tested during the quiet months of the coronavirus pandemic at the 200-kilometer (125-mile) Greek border with Turkey to stop people entering the European Union illegally.
A new steel wall, similar to recent construction on the U.S.-Mexico border, blocks commonly-used crossing points along the Evros River that separates the two countries.
Nearby observation towers are being fitted with long-range cameras, night vision, and multiple sensors. The data