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From left : Japanese Foreign Minister Fumio Kishida, German Foreign Minister Sigmar Gabriel, US Secretary of State Rex Tillerson and British Foreign Secretary Boris Johnson sit at a table on the second day of a meeting of Foreign Affairs Ministers from the Group of Seven (G7) industrialised countries on April 11, 2017 in Lucca, Tuscany. / AFP PHOTO / Vincenzo PINTO (Photo credit should read VINCENZO PINTO/AFP via Getty Images)

From left : Japanese Foreign Minister Fumio Kishida, German Foreign Minister Sigmar Gabriel, US Secretary of State Rex Tillerson and British Foreign Secretary Boris Johnson sit at a table on the second day of a meeting of Foreign Affairs Ministers from the Group of Seven (G7) industrialised countries on April 11, 2017 in Lucca, Tuscany.   / AFP PHOTO / Vincenzo PINTO        (Photo credit should read VINCENZO PINTO/AFP via Getty Images)

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From left : EU High Representative for Foreign Affairs and Security Policy Federica Mogherini, German Foreign Minister Sigmar Gabriel, US Secretary of State Rex Tillerson, Canadian Foreign Minister Chrystia Freeland, Italy Foreign Minister Angelino Alfano, French Foreign Minister Jean-Marc Ayrault, British Foreign Secretary Boris Johnson and Japanese Foreign Minister Fumio Kishida pose for a family picture on the second day of a meeting of Foreign Affairs Ministers from the Group of Seven (G7) industrialised countries on April 11, 2017 in Lucca, Tuscany. / AFP PHOTO / Vincenzo PINTO (Photo credit should read VINCENZO PINTO/AFP via Getty Images)

From left : EU High Representative for Foreign Affairs and Security Policy Federica Mogherini, German Foreign Minister Sigmar Gabriel, US Secretary of State Rex Tillerson, Canadian Foreign Minister Chrystia Freeland, Italy Foreign Minister Angelino Alfano, French Foreign Minister Jean-Marc Ayrault, British Foreign Secretary Boris Johnson and Japanese Foreign Minister Fumio Kishida pose for a family picture on the second day of a meeting of Foreign Affairs Ministers from the Group of Seven (G7) industrialised countries on April 11, 2017 in Lucca, Tuscany.   / AFP PHOTO / Vincenzo PINTO        (Photo credit should read VINCENZO PINTO/AFP via Getty Images)

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British Foreign Secretary Boris Johnson (L) and Japanese Foreign Minister Fumio Kishida take their position for a family picture during a meeting of Foreign Affairs Ministers from the Group of Seven (G7) industrialised countries on April 10, 2017 in Lucca, Tuscany. / AFP PHOTO / Vincenzo PINTO (Photo credit should read VINCENZO PINTO/AFP via Getty Images)

British Foreign Secretary Boris Johnson (L) and Japanese Foreign Minister Fumio Kishida  take their position for a family picture during a meeting of Foreign Affairs Ministers from the Group of Seven (G7) industrialised countries on April 10, 2017 in Lucca, Tuscany.   / AFP PHOTO / Vincenzo PINTO        (Photo credit should read VINCENZO PINTO/AFP via Getty Images)