<p>Police used water cannons to try to disperse thousands of protesters during a second day of demonstrations on July 7 in Hamburg, Germany, as world leaders met for the G20 summit.</p><p>Authorities said some 160 officers had been injured and at least 70 protesters arrested as some 15,000 members of security forces patrolled the streets. Credit: Radio Free Europe/Radio Liberty via Storyful</p><br />
