Nasa faces journey into the unknown

Barack Obama, the US president, is to outline his vision for the future of the nation's space programme on Thursday, including ending a programme to send US astronauts back to the moon in a decade.

But the move, due to a budget cut, has drawn criticism from Neil Armstrong, the first man on the moon, and two fellow astronauts, saying it will destroy, with a stroke of a pen, what has taken decades to build up.

Al Jazeera's Cath Turner reports. (Apr 15, 2010)