A US airline has unveiled plans to bring back supersonic transatlantic flights by the end of the decade.
United Airlines has conditionally agreed to buy jets capable of flying at speeds of Mach 1.7 - twice as fast as modern airliners.
It could see flight times slashed in half - with a journey from London to Newark in New Jersey taking three and a half hours.
SUBSCRIBE to our YouTube channel for more videos: www.youtube.com/skynews
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí www.youtube.com/channel/skynewsespanol
Like us on Facebook: www.facebook.com/skynews
Follow us on Instagram: www.instagram.com/skynews
For more content go to news.sky.com and download our apps: