Hamburg's mayor Olaf Scholz (first row, C-L) poses with partners of the G20 summit participants at the city hall in Hamburg, northern Germany, on July 8, 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 / POOL / Jens Buttner