Nasa tests out the water deluge system for its new Space Launch System (SLS). The Ignition Overpressure Protection and Sound Suppression (IOP/SS) system releases two million litres (450,000 gallons) during take-off to dampen the huge shockwaves and heat of a rocket launch. It has been in place since the Space Shuttle but has been upgraded for the SLS Subscribe to Guardian News on YouTube ► http://bit.ly/guardianwiressub Support the Guardian ► https://theguardian.com/supportus The Guardian ► https://www.theguardian.com The Guardian YouTube network: The Guardian ► www.youtube.com/theguardian 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