People walk under the open roof of between the halls of the Messe Basel fairground designed by Swiss architects Herzog & de Meuron at the Messeplatz square in Basel, Switzerland March 18, 2021. REUTERS/Arnd Wiegmann/File Photo
People walk under the open roof of between the halls of the Messe Basel fairground designed by Swiss architects Herzog & de Meuron at the Messeplatz square in Basel, Switzerland March 18, 2021. REUTERS/Arnd Wiegmann/File Photo