ELMAU, GERMANY - JUNE 8: From (L to R) British Prime Minister David Cameron, Italian Prime Minister Matteo Renzi,French President Francois Hollande, President of the European Commission Jean-Claude Juncker, President of the European Council Donald Tusk, German Chancellor Angela Merkel, Japanese Prime Minister Shinzo Abe, U.S. President Barack Obama and Canadian President Stephen Harper  pose at the group photo at the summit of G7 nations at Schloss Elmau on June 7, 2015 near Garmisch-Partenkirchen, Germany. (Photo by Goran Gajanin/Anadolu Agency/Getty Images)