Hamburg's mayor Olaf Scholz greets US First Lady Melania Trump as she arrives to attend the partners' programme at the city hall during the G20 summit 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