Atlantis began its re-entry into Earth's atmosphere Thursday ahead of a final homecoming that brings down the curtain on NASA's 30-year space shuttle program.
Space Exploration
Jul 21, 2011
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(AP) -- A pair of astronauts stepped out on the third and final spacewalk of their shuttle mission Monday, helping to install an enormous oxygen tank at the International Space Station.
Space Exploration
Nov 23, 2009
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Engineers from the US space agency NASA think they have discovered the cause of a hydrogen leak which twice delayed a high-profile shuttle launch this month, according to the agency.
Space Exploration
Jun 23, 2009
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