My take on this: Both campaigns have been briefed on national security matters. Biden knows that we well get into a conflict with Iran, sooner rather than later. He is preparing his audience for the probability that we will have to take out Iran’s nuclear weapons program. So Biden is hinting at JFK and the Cuban Missile Crisis vs. Obama and Iran. Obama and Biden are wrong about many things but even they must realize that we cannot afford to let Iran start a nuclear war. They have no doubt been briefed about some scary, top secret info about Iran. Biden and Obama are at least intelligent enough to know that something will have to be done, so Biden is appealing to the moonbats to trust them.
the hinting around alone should cost him any security clearance he has