“What possible national security concerns could there be after -60- years?”
Excellent question—and there is an answer.
Mossad worked with the CIA to kill JFK—the issue was that JFK refused to allow Israel to get the atomic bomb.
If JFK had won re-election and then Bobby had been president for another eight years after that the Israelis would have been stymied for more than another decade.
You can pm me if you want more details.
(US leaders are terrified of pointing the finger at Israel as a co-conspirator even though all the individuals involved are long dead.)
PM sent.