Parkland shooting survivor Emma Gonzalez – who had been a leading voice immediately after the attack on her school – took to the stage in Washington DC for six minutes and 20 seconds, much of that in silence. She says it was the amount of time it took a shooter to kill 17 people at her school in Florida last month Subscribe to Guardian News ► http://bit.ly/guardianwiressub Thousands join March for Our Lives anti-gun protests around the world ► https://www.theguardian.com/us-news/2018/mar/24/washington-march-for-our-lives-gun-violence Support the Guardian ► https://theguardian.com/supportus The Guardian ► https://www.theguardian.com/ The Guardian YouTube network: The Guardian ► null Owen Jones talks ► http://bit.ly/subsowenjones Guardian Football ► http://is.gd/guardianfootball Guardian Sport ► http://bit.ly/GDNsport Guardian Culture ► http://is.gd/guardianculture Guardian Science and Tech ► http://is.gd/guardiantech