Walter is incredibly thorough in his research. Highly recommend his other books!

nitter.moomoo.me/WalterIsaacson/status/1659246428164587545#m (https://nitter.moomoo.me/WalterIsaacson/status/1659246428164587545#m)

https://nitter.moomoo.me/elonmusk/status/1659256261068595201#m