NASA astronauts conduct first all-female spacewalk | USA TODAY

NASA astronauts Christina Koch and Jessica Meir will venture outside the International Space Station for the first all-female spacewalk, six months after an earlier attempt was canceled.

Koch and Meir will replace a faulty power controller on the orbiting spacecraft.

Koch had been scheduled to conduct the first all-female spacewalk with Anne McClain in March, but the two astronauts both required medium-size suits, and there was only one available.

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