Astronaut Chris Williams shows off a “strong man” pose 260 miles above Earth during a break in work to repair the International Space Station’s robot arm. Image: NASA

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Astronaut Chris Williams shows off a “strong man” pose 260 miles above Earth during a break in work to repair the International Space Station’s robot arm. Image: NASA

Expedition 74 flight engineers Chris Williams and Jessica Meir replaced wrist joint on the station's workhorse manipulator.

The orbital surgery on the International Space Station returned the Canadian-built robot arm to full health after its "wrist" joint failed last month.