Riot police use water cannon against protesters on July 7, 2017 in Hamburg, northern Germany, where leaders of the world's top economies gather for a G20 summit. Protesters clashed with police and torched patrol cars in fresh violence ahead of the G20 summit, police said. German police and protestors had clashed already the day before at an anti-G20 march, with police using water cannon and tear gas to clear a hardcore of masked anti-capitalist demonstrators, AFP reporters said. / AFP PHOTO / Christof STACHE (Photo credit should read CHRISTOF STACHE/AFP/Getty Images)
