The astronaut husband of Arizona Rep. Gabrielle Giffords is gearing up for a space shuttle mission Mark Kelly will fly on the Space Shuttle Endeavour's final flight .
Kelly had been at his wife’s side since she was gravely wounded in a shooting rampage in her home district . The suspect has pleaded not guilty to all charges in the Jan. 8 shooting .
Kelly took a leave from training after Giffords was gunned down in Tucson, Ariz., on Jan. 8. NASA announced earlier today he would resume training for space shuttle Endeavour's two-week mission.
