In post-pandemic Europe, migrants will face digital fortress

  • Police officers patrol alongside a steel wall at Evros river, near the village of Poros, at the Greek -Turkish border, Greece, Friday, May 21, 2021. An automated hi-tech surveillance network being built on the Greek-Turkish border aiming at detecting migrants early and deterring them from crossing, with river and land patrols using searchlights and long-range acoustic devices. (AP Photo/Giannis Papanikos)

PEPLO, Greece — As the world begins to travel again, Europe is sending migrants a loud message: Stay away!