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The first step of unstowing the arm, expected to occur this afternoon, involves moving the scoop towards the arm with the wrist joint, which will release a spring-loaded pin that kept the arm restrained during Phoenix's August launch and Sunday landing, Goldstein said.
Originally posted by memoir
Here's a spring loaded pin... no parts shooting off here.
Nasa should add a button in the image galleries... like a "Hey NASA, WTF is that?" button.