The Space Boffins are in America to hear about Neil Armstrong and the hypersonic X-15 at the Edwards Air Force base, and they're also reporting from the surface of Mars. More precisely, from the UK's new Mars Yard, in Stevenage. But the head of the UK Space Agency, the European Space Agency's head of robotic exploration and Business Secretary Vince Cable are also walking on the red planet with them. There's also an interview with former space shuttle astronaut Jon McBride and the studio guest is Helen Keen - presenter of Radio 4 comedy 'It Is Rocket Science'.
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