ASA spacewalkers (from left) Bob Behnken and Chris Cassidy give a thumbs up during a spacewalk to install hardware and upgrade International Space Station systems.
from NASA https://ift.tt/36Jo8AZ
Thumbs Up From Out of This World
ASA spacewalkers (from left) Bob Behnken and Chris Cassidy give a thumbs up during a spacewalk to install hardware and upgrade International Space Station systems.
from NASA https://ift.tt/36Jo8AZ
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