From RFK: A Candid Biography of Robert F. Kennedy by C. David Heymann, p. 505:
Ted Van Dyk: “In the middle of the night I was shaken awake by David Gartner, a personal aide to the vice president. And Dave said, ‘Humphrey says get up, Robert Kennedy's been shot.’ And I said, ‘David, that's a sick joke.’ He said, ‘No, no, Robert Kennedy's been shot.’
“So I got up and Humphrey was absolutely distraught, he was just absolutely beside himself with anxiety and concern. And we then received a telephone call from Steve Smith and Pierre Salinger in California. They said, ‘There's a brain surgeon we trust in Boston. Could you arrange for a private plane to fly him to Los Angeles? Because Robert Kennedy's still alive and there's a possibility of saving him.’
Humphrey called up the commanding general of the air force, who happened to be there at the academy. And Humphrey said, ‘Will you please dispatch this plane?’ The general said, "I surely will."