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VALLETTA, MALTA - FEBRUARY 3: British Prime Minister Theresa May (L), Belgian Prime Minister Charles Michel (C) and Prime Minister of Luxembourg, Xavier Bettel (R) chat during an informal European Union summit with the attendance of European Union delegates and heads of states on February 3, 2017 at Grandmaster's Palace in Valletta, Malta. European Union leaders will discuss illegal immigration into Europe. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images)