Financial cuts hit Moon mission
President Barack Obama has cancelled the American project designed to take humans back to the Moon.
The Constellation programme envisaged new rockets and a new crewship called Orion to put astronauts on the lunar surface by 2020.
But in his 2011 budget request issued on Monday, Mr Obama said the project was too costly, 'behind schedule, and lacking in innovation.'
US space agency Nasa has already spent $9bn (£5.6bn) on the programme.
The president said Constellation was draining resources from other US space agency activities. He plans instead to turn to the private sector for launch services.