10:01 (Part 1 of 6) Dr. Robert Zubrin - Ensuring heavy-lift capability in NASA's budget - 2009 Mars Soc. The Mars Society
10:01 (Part 2 of 6) Dr. Robert Zubrin - Ensuring heavy-lift capability in NASA's budget - 2009 Mars Soc. The Mars Society
10:01 (Part 3 of 6)Dr. Robert Zubrin - Ensuring heavy-lift capability in NASA's budget - 2009 Mars Soc. The Mars Society
10:01 (Part 4 of 6) Dr. Robert Zubrin - Ensuring heavy-lift capability in NASA's budget - 2009 Mars Soc. The Mars Society
7:17 (Part 5 of 6) Dr. Robert Zubrin - Ensuring heavy-lift capability in NASA's budget - 2009 Mars Soc. The Mars Society
6:22 (Part 6 of 6)Dr. Robert Zubrin - Ensuring heavy-lift capability in NASA's budget - 2009 Mars Soc. The Mars Society
