Just a guess.
[Robert Gates] sent a copy of the book to Obama with what he describes as “a very warm inscription.”
Did he also send a copy to Vice President Biden, described in the book as having been wrong on just about just every national security issue for decades?
“No, I didn’t.”
Via @NorahODonnell. I should also note my quiet, admittedly slightly conspiratorial theory that Gates wrote his book to make sure that Hillary Clinton is the Democratic nominee in 2016. Note, of course, that this does not mean that he wants her to win, per se; just that it’s better her than Joe Biden.