John Kennedy actually said...

"Your judgment, your perceptiveness and your vigorous approach to our common problems have been of tremendous value to me."

"It is only with deep regret that I accede to your request to retire from active duty."

"The gratitude of the nation as well as my own warm wishes will go with you into whatever field of endeavor you turn your energies."

"We have the Navy represented, and NASA, and Mr. Williams, and the Air force."