CLEAN: Last Endeavour spacewalk marks 1,000 hours on station work

The video provides an up-close view of the station's robotic arm, focusing on its end effector as it disengages from a grapple fixture pin. The discussion includes operational procedures, observations, and final adjustments necessary for preparing the arm for motion.

What does the term 'medical first' refer to in the context of the robotic arm's operation?

Explain the significance of preparing motion in robotic operations.