For the first time ever, NASA has been forced to cut a mission to the International Space Station short due to a “serious medical condition” affecting a crew member. It’s a historic moment for the space station. According to Polk, early predictive models concluded a medical evacuation would happen once every three years — not 25. The ISS will have to continue operations with a much smaller crew of three after the departure of the Crew-11 crew. More on the situation: Astronaut on Space Station Suffers Medical Issue