Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: A demonstrator throws a table into a burning crush barrier during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 05: Demonstrators hold a 'Night Dance' protest ahead of Friday and Saturday's G20 summit on July 5, 2017 in Hamburg, Germany. Authorities are bracing themselves for protests as world leaders including Donald Trump, Vladimir Putin and Recep Tayyip Erdogan are due to arrive in the city for the summit. (Photo by Sean Gallup/Getty Images)Photo by: Sean Gallup Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protesters against the G20 Summit plunder a supermarket and throw the goods and installations into fires in the Schanzenviertel district on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrators react in front of the police water cannon during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 05: Demonstrators hold a "Night Dance" protest ahead of Friday and Saturday's G20 summit on July 5, 2017 in Hamburg, Germany. Authorities are bracing themselves for protests as world leaders including Donald Trump, Vladimir Putin and Recep Tayyip Erdogan are due to arrive in the city for the summit. (Photo by Sean Gallup/Getty Images)Photo by: Sean Gallup Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrators react next to a burning crush barrier during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Waitress looks to from a police unit running after demonstrators during an anti G20 Summit protest on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrator built a burning crush barrier during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrators react next to a burning crush barrier during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrators react next to a burning crush barrier during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protesters against the G20 Summit plunder a supermarket and throw the goods into fires in the Schanzenviertel district on July 7, 2017 in Hamburg, Germany. Prostester look for the food lying on the street. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protester Martin Friedrich Buehler walks with his bike between the police water cannon and violent demonstrators during during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrators react next to a burning crush barrier during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 05: Demonstrators hold a "Night Dance" protest ahead of Friday and Saturday's G20 summit on July 5, 2017 in Hamburg, Germany. Authorities are bracing themselves for protests as world leaders including Donald Trump, Vladimir Putin and Recep Tayyip Erdogan are due to arrive in the city for the summit. (Photo by Sean Gallup/Getty Images)Photo by: Sean Gallup Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protesters against the G20 Summit plunder a supermarket and throw the goods and installations into fires in the Schanzenviertel district on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protesters against the G20 Summit plunder and destroy a Rewe supermarket in the Schanzenviertel district on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protesters against the G20 Summit plunder a supermarket and throw the goods into fires in the Schanzenviertel district on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrators react in front of the police water cannon during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: A demonstrators wears a mask during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrators react in front of the police water cannon during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Demonstrator stands next to a fire during an demonstration against the G20 Summit at 'Schulterblatt' on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protesters against the G20 Summit plunder a supermarket and throw the goods into fires in the Schanzenviertel district on July 7, 2017 in Hamburg, Germany. Prostester look for the food lying on the street. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 05: Demonstrators, including one wearing mask to look like U.S. President Donald Trump, hold a 'Night Dance' protest ahead of Friday and Saturday's G20 summit on July 5, 2017 in Hamburg, Germany. Authorities are bracing themselves for protests as world leaders including Donald Trump, Vladimir Putin and Recep Tayyip Erdogan are due to arrive in the city for the summit. (Photo by Sean Gallup/Getty Images)Photo by: Sean Gallup Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 05: Demonstrators, inclduing one holding a sign that reads: "There is no PLANet B" hold a 'Night Dance' protest ahead of Friday and Saturday's G20 summit on July 5, 2017 in Hamburg, Germany. Authorities are bracing themselves for protests as world leaders including Donald Trump, Vladimir Putin and Recep Tayyip Erdogan are due to arrive in the city for the summit. (Photo by Sean Gallup/Getty Images)Photo by: Sean Gallup Photo gallery: Protesters march during the G20 Summit HAMBURG, GERMANY - JULY 07: Protester Martin Friedrich Buehler walks with his bike between the police water cannon and violent demonstrators during during a demonstration against the G20 Summit on July 7, 2017 in Hamburg, Germany. Leaders of the G20 group of nations are arriving in Hamburg today for the July 7-8 economic summit and authorities are bracing for large-scale and disruptive protest efforts. (Photo by Thomas Lohnes/Getty Images)Photo by: Thomas Lohnes