John Kennedy actually said...

"You can be free, you can be strong, you can solve your problems."

"And above all, we must build a strong full-time America to deal with the full-time Soviet challenge."

"If I am elected President of the United States, I do think it is possible to set before the American people the things which we must do in order to maintain our freedom"

"I do come here as a candidate for the office of the Presidency and I run for the office of the Presidency in a most difficult and dangerous time for us all"