Videos Must See Video: XCOR's Jeff Greason ISDC 2011 Keynote Address: A Settlement Strategy for NASA By Keith Cowing NASA Watch June 1, 2011 Filed under ISDC, Jeff Greason, NASA, NSS, video, XCOR Keith Cowing NASA Watch founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber.