Final check-in
![Several flight passengers stand by to take their Covid-19 test at a testing center at Incheon International Airport on Tuesday. From Tuesday, all people traveling to the United States, including U.S. citizens, have to submit a negative Covid-19 test result before boarding their planes. [YONHAP]](https://koreajoongangdaily.joins.com/data/photo/2021/01/26/27fefe63-735e-4cb9-bf6d-f15ea7c13484.jpg)
Several flight passengers stand by to take their Covid-19 test at a testing center at Incheon International Airport on Tuesday. From Tuesday, all people traveling to the United States, including U.S. citizens, have to submit a negative Covid-19 test result before boarding their planes. [YONHAP]
with the Korea JoongAng Daily
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