No tears for Johnny, people don't you cry
No tears for Johnny - just because he's going to die
He's gonna be a hero,now til the end of time
So shed no tears for Johnny, marching in the long grey line

Guy called Ian Whitcomb recorded it many years ago - with Larry Adlers son Peter in the group, if I remember rightly. I used to have it on vinyl. If there was a version aboiut JFK it was presumably an adaptation of this one. I'll see if any more emerges from the black hole I call a memory.

Regards