Astronauts from International Space Station Expedition 64 perform spacewalk number 73, which is expected to last six and a half hours.
The spacewalk will be conducted by NASA astronauts Victor Glover and Mike Hopkins to continue upgrading the station.
Expedition commander Sergey Ryzhikov and flight engineers Sergey Kud-Sverchkov and Kate Rubins will return to Earth on 17 April in the Soyuz MS-17 that carried them to the space station in October 2020.
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