Photo taken on May 9, 2021 shows the Establishment of the Poseidoniasts at night on the island of Delos, Greece. (Xinhua/Marios Lolos) The arrival of the first charter flights from central Europe on Friday coincided with the easing of restrictions against the novel coronavirus. Greece aspires to build on last year's unexpected success of securing more than 6 million tourist arrivals and over 4 billion euros (4.84 billion U.S. dollars) in...