Reporter: Why should we care more about Mars than we do our own planet? Emma: We shouldn't. Of course, we should care about social imperatives. But in the US alone, we spend a trillion dollars each year on the military, and mostly in case the countries represented here decide to blow each other off the face of the Earth. This mission, it costs a fraction of that, as we work together, repurposing those same tools of destruction for discovery. Kwesi: At this very moment, there's a team of astronauts on the Moon, mining polar ice caps for fuel and water. Misha: Water that will be pumped into the hull of our ship to shield us from radiation, allowing us to travel safely from the Moon to Mars. Emma: Reaching Mars... might prove to be the greatest achievement. Not only for science, but for the future of our planet.