Yitzhak Rabin was in Dallas the day JFK was shot. Except from Leah Rabin's book, Rabin Our Life His Legacy, calls it a "mere coincidence."

"Our 1963 trip to the United States lasted 3 weeks. I was astonished at the size and the excitement of New York. This was a fast-moving lifestyle unlike anything I had known in Europe or Israel. Dalia and Yuval along with a number of officers, met us at Lod Airport in Tel Aviv upon our return. We were told that President Kennedy had been shot, his condition was as yet unclear. We had never met the Kennedy’s but we could sense how the promise of John Kennedy’s future had stirred American’s and how devastating it would be if something serious had happened to him. Just as we walked in the door of our home, I picked up the phone to hear shocking news: John F. Kennedy was dead. To have just returned from the United States and for Yitzhak to have been in Dallas just hours before—albeit as mere coincidence; Fort Bliss was a stop on his military briefing tour—was disorienting. Yitzhak was about to become chief of staff and had just completed an intensive study of state-of-the-art defense and security practices from the most powerful nation in the world and suddenly we learned that country’s chief-executive was slain by a lone-gunman." Rabin was promoted to Chief of Staff soon after the assassination. And it was under Rabin in 1967 that the IDF attacked and attempted to sink the USS Liberty. The rescue of which, and later investigations into, were basically scuttled by Lyndon Johnson. The same Johnson who was the main beneficiary of the assassination of JFK.