(1st row L-R) Britain's Prime Minister Theresa May, Russia's President Vladimir Putin, Turkey's President Recep Tayyip Erdogan, German Chancellor Angela Merkel arrive for a family photo of the participants of the G20 summit in Hamburg, northern Germany, on July 7, 2017. Leaders of the world's top economies gather from July 7 to 8, 2017 in Germany for likely the stormiest G20 summit in years, with disagreements ranging from wars to climate change and global trade. / AFP PHOTO / Tobias SCHWARZ