Voir l’article du Dailymail et les photos sur http://www.dailymail.co.uk/sciencetech/article-2543245/Virgin-Galactic-goes-SUPERSONIC-Incredible-video-reveals-SpaceShipTwo-broke-sound-barrier-test-flight.html et aussi http://www.virgingalactic.com/news/item/virgin-galactic-reaches-new-heights-in-third-supersonic-test-flight/ et http://lf5422.wordpress.com/2014/01/18/vols-commerciaux-very-high-cost/  …