Together and apart, the lives of Gabrielle Giffords and husband-astronaut Mark Kelly have been extraordinary. She the congresswoman from Arizona who has miraculously survived being shot in the head. He the commander of the space shuttle Endeavour, exchanging wedding rings with his wife before his final mission in space. Now, he is retiring to be with her full time and the two are collaborating on a memoir that will tell a story, their story, that Kelly says the public hardly knows.