Musk revises Mars ambitions
I don't understand why people are so quick to dismiss SpaceX's ambitions as unrealistic.They were the first to achieve re-usability of the first stage of an orbital class rocket, the first to prove out supersonic retro-propulsion and the first private company to re-fly a spacecraft (the Dragon Capsule). Given that, it seems like they should be given the benefit of the doubt when they say they are going to do something.