NASA moon astronauts say don't cancel Constellation program
Two former NASA astronauts criticized the recent decision to cancel NASA's moon landing program known as the Constellation program.
In Pictures The full moon
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Eugene Cernan, part of the 1972 Apollo 17 mission, said he's disheartened he's the last man to have walked on the moon and "I thought we'd (have) gone back long before now."
Cernan said the U.S. has a responsibility to maintain leadership in space exploration, and he hopes people will be back on the moon "sooner than later."
Cernan and Lovell spoke to the BBC on Friday in London.
The decision to cancel NASA's $100 billion Constellation program was announced last month.