Reconvening and JFK

After dealing with (or avoiding, if you were a wimp that thought you'd learn something from joining the Army) the harsh lessons that this grand country learned from the Vietnam War, you return to the almost comfortable enclosed quarters of the Time Machine. While you're waiting for the crab guy to show up and tell you what's gonna happen next, you wonder why they even let a highschool enroll in the military. I mean really, who would believe you to be an 18 year old? 

STOP THINKING MORTAL, THAT WAS BUT THE FIRST OF YOUR CHALLENGES. THERE IS MORE TO LEARN FROM THE VIETNAM WAR, AND THAT IS THE ASSASSINATION OF JFK.

"Oh cool, I learned a lot about this from Mr. Flower's presentation on the 50th anniversary of his assassination!"

GOOD, GOOD. WELL THEN, RIDDLE ME THIS:

[WERE THERE MULTIPLE SHOOTERS, ALL OF WHOM TIED TO THE RUSSIAN SECRET SERVICE, LEE HARVEY OSWALD WAS SET UP, AND LBJ KNEW ABOUT THE ASSASSINATION AND DIDN'T STOP IT BECAUSE HE WANTED TO BECOME PRESIDENT AND DRAG OUT THE VIETNAM WAR?]

OR,

[WAS LEE HARVEY OSWALD THE ONLY SHOOTER, AND THE "MAGIC BULLET" THAT KILLED JFK ACTUALLY CAME FROM LEE'S RIFLE, EVEN THOUGH SOME FILMS DEPICT JFK'S BODY MOVING IN WAYS THAT WOULD MAKE PEOPLE THINK OTHERWISE?]