1. Interview, E. Mango/P. Kirkpatrick, July, 24, 2014
2. Ibid.
3. "NASA Selects Commercial Firms to Begin Development of Crew Transportation Concepts and Technology Demonstrations for Human Spaceflight Using Recovery Act Funds". Press release (NASA). February 1, 2010.
4. Dean, James. "NASA awards $270 million for commercial crew efforts". space.com, April 18, 2011.
5. Interview, E. Mango/P. Kirkpatrick, July, 24, 2014