SPEXcast sits down to discuss SpaceX's big announcement from IAC, the Interplanetary Transport System. We break down the key points as well as highlight the challenges facing the colossal project. We also propose a few questions we still have after the announcement.
X-33/VentureStar-What really Happened?
https://www.nasaspaceflight.com/2006/01/x-33venturestar-what-really-happened/

Boeing CEO Vows to Beat Musk to Marshttps://www.bloomberg.com/news/articles/2016-10-04/boeing-ceo-vows-to-beat-musk-to-mars-as-new-space-race-beckons