There's an old joke that when a new President is elected the Security Services take the new President into a room were there's a projector showing a film of the

There's an old joke that when a new President is elected the Security Services take the new President into a room were there's a projector showing a film of the Kennedy assassination but from a different angle from the Zapruder film. At the end, the Security Services representative turns to the new President and asks "any questions?".