How does air turbulence work? Aviation expert explains issues faced by Flight SQ321 | ITV News

ITV News Health and Science correspondent Martin Stew joins aviation expert Richard Dale on a flight simulator to understand what happened to Singapore Airlines Flight SQ321. • Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj • Get breaking news and more stories at http://www.itv.com/news Follow ITV News on Facebook: https://www.facebook.com/itvnews/ Follow ITV News on Twitter: https://twitter.com/itvnews Follow ITV News on Instagram: https://www.instagram.com/itvnews/