Spacewalking astronaut copes with frayed tether, bad jetpack

In this image from video made available by NASA, astronaut Joe Acaba performs a spacewalk outside the International Space Station on Friday, Oct. 20, 2017. Acaba was barely outside an hour when he had to replace one of his safety tethers. Spacewalking astronauts always have more than one of these crucial lifelines in case one breaks. They also wear a jetpack in case all tethers fail and they need to fly back to the space station. (NASA via AP)

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