Elon Musk outlines Mars colonisation plan – video

SpaceX founder Elon Musk describes his highly ambitious vision for manned missions to Mars at a conference in Mexico. 'The key is making this affordable to almost anyone who wants to go,' he says. The first flights would be 'fairly expensive' but ticket prices could later drop to as little as $100,000. One day he hopes the transport system will give 'full access to he entire greater solar system' once refuelling stops are established