Palau President Surangel Whipps, center, lines up to take COVID-19 virus antigen test with Taiwanese travellers of the first group of Palau-Taiwan Travel Corridor before leaving Taiwan, at Taoyuan International Airport in Taoyuan, northern Taiwan, Thursday, April 1, 2021. The Palau-Taiwan Travel Corridor, allowing people to travel between the islands without a COVID-19 quarantine, has started Thursday. (AP Photo/Chiang Ying-ying)