DescriptionSellers translating along truss during EVA-3 on STS-121.jpg English: Astronaut Piers J. Sellers, NASA's STS-121 mission specialist, translates along a...
DescriptionSTS-121 EV1 Piers Sellers (27368406143).jpg STS-121 EV1 Piers Sellers translates along the S1 Truss carrying the fixed grapple bar that is...
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