Kek!
Can you imagine being him? Knowing all that he knows, and not being able to say a word of it to his wife. I'm sure she wonders why he stays awake late at night and into the early morning. Tossing and turning, unable to sleep. Once you've seen certain things, it stays with you forever. There is no "forgetting it" or "moving on from it". It haunts you until the very end. At least he can look at himself in the mirror every morning and night and know he made a difference in the history of America.