Robert Zubrin
A tri-color Mars flag is unfurled by Mars Society President Dr. Robert Zubrin at the end of a presentation by Inspiration Mars officials Dennis Tito and Taber MacCallum (r to l) during today’s afternoon session at the 2013 International Mars Society Convention in Boulder.


A tri-color Mars flag is unfurled by Mars Society President Dr. Robert Zubrin at the end of a presentation by Inspiration Mars officials Dennis Tito and Taber MacCallum (r to l) during today’s afternoon session at the 2013 International Mars Society Convention in Boulder.