54
Vance, Elon Musk, 109.
55
Musk, remarks at Stanford University Entrepreneurial Thought Leaders.
56
Brad Stone, The Everything Store: Jeff Bezos and the Age of Amazon (New York: Little, Brown, 2014), 153.
57
Jeff Bezos, remarks at Satellite 2017 conference, March 8, 2017.
58
Columbia Accident Investigation Board report (Washington, DC: Government Printing Office, 2003), 38.
59
Rebecca Wright, «Interview with Michael Griffin,» NASA Oral History Project, September 10, 2007.
60
Don Pettit, «The Tyranny of the Rocket Equation,» NASA, May 1, 2012, accessed August 22, 2017, https://www.NASA.gov/mission_pages/station/expeditions/ expedition30/tryanny.html.
