Your husband was an incredible individual! His contributions to NASA and the world of aviation or nothing short of exceptional!
While I know you'll miss his physical presence, trust that all the rich memories and moments you were blessed to share will never depart.
Also rest assured that you have so many people around you who are eager to stand by you and support you through this difficult time. It is the least we can do for a woman who has so selflessly served her husband and others so gracefully and generously.