John Kennedy actually said...

"It seems to me that your year's effort has demonstrated two things: first, the feasibility of this approach and secondly, the need to pursue our objective vigorously and without letup."

"It is clear that we must move forward on all approaches that will contribute to achieving our goal."

"You will, I know, continue your efforts to improve the operation of the program in this respect."

"I'm confident with your support, which you have demonstrated on many battlefields and many different parts of the world, that with your support we can meet the challenges that lie ahead."