Rand Simberg is an aerospace engineer and a consultant in space commercialization, space tourism, and Internet security. He is the author of Safe Is Not an Option: Overcoming the Futile Obsession with ‘Getting Everyone Back Alive’ That Is Killing Our Expansion into Space (2013). Simberg’s blog, Transterrestrial Musings, can be found at www.transterrestrial.com. You can follow Simberg on Twitter: @Simberg_Space and @SafeNotAnOption.