In this Wednesday, July 1, 2020, file photo, Marcel Schmetz raises the U.S. flag next to a WWII American Sherman tank at his Remember Museum 39-45 in Thimister-Clermont, Belgium. Tourists from the United States who are fully vaccinated against COVID-19 could be able to travel across the European Union this summer, officials from the 27-nation bloc said on Monday, April 26, 2021. (AP Photo/Francisco Seco, File)
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