FILE PHOTO: Travellers line up at a check-in counter of the Cologne-Bonn Airport, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, July 28, 2020. REUTERS/Wolfgang Rattay
FILE PHOTO: Travellers line up at a check-in counter of the Cologne-Bonn Airport, as the spread of the coronavirus disease (COVID-19) continues, in Cologne, July 28, 2020. REUTERS/Wolfgang Rattay