Once one of the world's most powerful travel documents, the might of the US passport has been diminished during the pandemic. With US Covid-19 cases now beyond the 25 million mark, some nations continue to view American vacationers warily.
원문출처 : https://www.cnn.com/travel/article/us-international-travel-covid-19/index.html
원문출처 : https://www.cnn.com/travel/article/us-international-travel-covid-19/index.html