Cambridge University students float down the River Cam in cardboard boats, part of the annual traditions to celebrate the end of exams, in Cambridgeshire, United Kingdom, on Jun. 17. (Joe Giddens/PA Images/Getty Images)
German Chancellor Angela Merkel and French President Emmanuel Macron wave to the crowds during a welcoming ceremony at the chancellery in Berlin on May 15, 2017. (Tobias Schwarz/AFP/Getty Images)
French President Emmanuel Macron runs to greet people, after the annual Bastille Day military parade on the Champs-Elysees avenue in Paris on July 14, 2018. (PHILIPPE WOJAZER/AFP/Getty Images)