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John Mcfall, 43, A Former Paralympian And Orthopedic Surgeon, Became The First Astronaut With A Disability To Receive Medical Clearance For Long-Duration Space Missions. After Passing All Exams, He’s Eligible For The ISS With The ESA. The Green Light Puts Him On A Waiting List, Not Guaranteed A Spot On A Mission, Marking A Major Cultural Shift.