In this Wednesday, June 9, 2021, file photo, visitors gather during a presentation visit of the "Grand Palais Ephemere", with the Eiffel Tower in the background, in Paris. Europe is opening up to Americans and other visitors after more than a year of COVID-induced restrictions. European governments hope to lure back tourists — and their dollars — back to the continent’s trattorias, vistas and cultural treasures. (AP Photo/Francois Mori, File)
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