He defended his decision to end the Constellation program that NASA began under former President George W.Bush.

VOA: special.2010.04.28

NASA is to continue developing the Orion crew capsule, which was part of the cancelled Constellation program.

VOA: special.2010.04.28

He thinks NASA should focus on getting to Mars, not going to the moon under the Constellation program.

VOA: standard.2010.04.15

That budget would end funding for the Constellation program, which would have returned U.S.astronauts to the moon as a stepping stone to Mars.

VOA: standard.2010.04.15

But the Obama administration says it wants to scrap the program, known as Constellation, following an independent panel's finding that NASA lacks the resources to see it through.

VOA: standard.2010.03.18

Shuttle worker Jeffrey Bell argues NASA should continue with Constellation.

VOA: standard.2010.03.18