10:00 (1 of 7) Dr. Robert Zubrin's Plenary Presentation at the National Space Society's ISDC 2009 The Mars Society
10:00 (2 of 7) Dr. Robert Zubrin's Plenary Presentation at the National Space Society's ISDC 2009 The Mars Society
10:00 (3 of 7) Dr. Robert Zubrin's Plenary Presentation at the National Space Society's ISDC 2009 The Mars Society
10:00 (4 of 7) Dr. Robert Zubrin's Plenary Presentation at the National Space Society's ISDC 2009 The Mars Society
10:00 (5 of 7) Dr. Robert Zubrin's Plenary Presentation at the National Space Society's ISDC 2009 The Mars Society
10:00 (6 of 7) Dr. Robert Zubrin's Plenary Presentation at the National Space Society's ISDC 2009 The Mars Society
4:22 (7 of 7) Dr. Robert Zubrin's Plenary Presentation at the National Space Society's ISDC 2009 The Mars Society
