LONDON, ENGLAND - MARCH 28: British Prime Minister Theresa May in the cabinet office signs the official letter to European Council President Donald Tusk invoking Article 50 and the United Kingdom's intention to leave the EU on March 28, 2017 in London, England. After holding a referendum in June 2016 the United Kingdom voted to leave the European Union, the signing of Article 50 now officially triggers that process. (Photo by Christopher Furlong - WPA Pool/Getty Images)
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Getty Images News Christopher Furlong