STS-121 mission specialists Michael Fossum (left) and Piers Sellers prepare for the second of three planned spacewalks of their spaceflight inside the Quest airlock of the International Space Station (ISS). Credit: NASA.
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STS-121 mission specialists Michael Fossum (left) and Piers Sellers prepare for the second of three planned spacewalks of their spaceflight inside the Quest airlock of the International Space Station (ISS). Credit: NASA. |
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