Triggering Article 50

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British Prime Minister Theresa May triggers Article 50 of the Lisbon Treaty today, formally beginning the UK's exit from the European Union. Manuela Saragosa speaks to British Brexit-supporting economist Ruth Lea and British member of the European parliament Richard Corbett about the challenges Britain now faces as it embarks on two years of negotiations with the EU. (Photo: Theresa May signs letter triggering Article 50, Credit: Getty Images)