Mark Kelly thanks Tucson, nation for support; outlines next steps for wife's care
Rep. Gabrielle Giffords to enter rehab hospital
Doctors, husband remain optimistic
Stricken congresswoman's condition upgraded to 'serious'
Rep. treated for buildup of fluid in the brain
Moving to Texas rehab center
Returning after spending time with his wife, Congresswomen Giffords who was wounded in a shooting