In this Oct. 8, 2019, file photo, technicians walk at the under a construction site of the Expo 2020 in Dubai, United Arab Emirates. Dubai's Expo 2020 world's fair will be postponed to Oct. 1, 2021, over the new coronavirus pandemic, a Paris-based body behind the events said Monday, May 4, 2020. (AP Photo/Kamran Jebreili, File)
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