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The source of the debris hasn't been confirmed. Two weeks ago Russia had conducted an anti-satellite test that created a \"dangerous\" debris field in the orbit.

\"PHOTO:
Xinhua News Agency via Getty Images, FILE
PHOTO: Chinese astronaut Liu Boming conducts extravehicular activities out of the space station core module Tianhe at Beijing Aerospace Control Center, on July 4, 2021.
>

The spacewalk was scheduled to last 6 1/2 hours and be Barron's first and Marshburn's fifth spacewalk, NASA said.

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