NASA has scrapped its first all-female spacewalk for now because there aren't enough spacesuits that fit

NASA said Monday it has only one spacesuit size medium available at the station. But the agency clarified Tuesday that it has more than one medium-size spacesuit torso aboard but said to stay on schedule with the space station upgrades, "it's safer and faster to change spacewalker assignments than reconfigure spacesuits."

The astronauts were set for a series of three spacewalks to complete work on the International Space Station. On March 22, Hague and McClain conducted the first in the series. McClain and Koch were set to go out together Friday to continue work on installing powerful lithium-ion batteries for one pair of the station's solar arrays.

"However, after consulting with McClain and Hague following the first spacewalk, mission managers decided to adjust the assignments, due in part to spacesuit availability on the station," a NASA statement said.

"McClain learned during her first spacewalk that a medium-size hard upper torso -- essentially the shirt of the spacesuit -- fits her best. Because only one medium-size torso can be made ready by Friday, March 29, Koch will wear it."

McClain and Koch will both be making history during this mission by being the 13th and 14th women to perform a spacewalk.

As for the third spacewalk in the series, McClain is tentatively scheduled to be joined by Canadian Space Agency astronaut David Saint-Jacques on April 8.

The NASA website shows the spacewalk will last about seven hours.

McClain and Koch were part of the 2013 astronaut class, half of which were women, and came from the second-largest number of applications NASA ever received, more than 6,100. The most recent class of flight directors was also 50% women, the agency said.

McClain was on the International Space Station as part of Expedition 58, while Koch blasted off into space on March 14 to reach the station for Expedition 59 and 60, along with Cmdr. Alexey Ovchinin and Hague. It's the first time in space for McClain and the first spaceflight for Koch.

Spacewalks are held for a number of reasons, according to NASA, including doing work outside a spacecraft, conducting science experiments and testing new equipment. Astronauts also conduct spacewalks to fix satellites or spacecraft instead of having them brought back to Earth.

This article has been updated to clarify that the all-female spacewalk has been delayed for now.

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