Nasa Delays ISS Spacewalk Due To Astronaut's Medical Issue

Nasa is delaying a spacewalk at the International Space Station because of a medical issue involving one of its astronauts. From a report: Officials announced the postponement on Monday, less than 24 hours before Mark Vande Hei was supposed to float outside. Vande Hei was dealing with "a minor medical issue," officials said. It was not an emergency, they noted, but did not provide any further details. Vande Hei, 54, a retired army colonel, has been at the space station since April and is expected to remain there until next spring for a one-year mission. This is his second station stay.

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