Before NASA pioneers to Mars, Orion spacecraft faces tests

Aired: 12/3/2014 | 0:09:18 | Clip
NASA envisions a human presence on Mars in 20 years. But how will we get there? The Orion spacecraft, an unmanned capsule, will launch on its maiden voyage as an important test for future missions. Science correspondent Miles O’Brien reports on the engineering hurdles as well as the budgetary ones.

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