I'm always amazed at how some people seem absolutely certain that Oswald was the lone gunman.
They have absolutely no way of knowing, but they insist on it no matter how much proof to the contrary.
Guess what!
Not only did the CIA Kill JFK, but they did so with Eisenhower's approval.
What's more is Joe Kennedy Jr.'s death was also an assassination. There would be absolutely no reason to have an electric circuit to 'arm' the explosives on his plane. The types of explosives that were needed for that type of mission had to be the type that exploded on impact. Nothing else would have worked right. No 'arming' would have been needed - except if they wanted the explosives to go off when the explosives were 'armed'.
Gee, wasn't Eisenhower also ultimately in command of that mission as well?
And didn't Eisenhower give JFK the plans for the Bay of Pigs invasion, which Eisenhower had previously rejected?