An astronaut has lost his place on the space shuttle Discovery’s final voyage next month after crashing his bicycle last weekend.
This is the second time this month that Nasa had had to deal with crew issues. Last week, Nasa named a backup commander for the final flight of Endeavour in April. The official commander, Mark Kelly, remains at the hospital bedside of his wife, Congresswoman Gabrielle Giffords, who was seriously wounded in a shooting in Tucson, Arizona. His identical twin brother, Scott, is currently flying on the space station as its skipper.