JFK was wrong and LBJ was wrong, Unless the system asking the question was messed up.
I tryed Clinton, Reagan, Carter, LBJ, FDR, Teddy Roosevelt, Truman, and both Bushes, all were the wrong answer along with Nixon.
I even got so fed up I started trying Presidents that were in office before AIR FORCE ONE was even created.
So Washington, Adams, and Hamiliton aren't correct, neither was Ben Franklin.
I will try again today maybe the question is a trick question and the answer is Harrison Ford(who played the President in the movie AIR FORCE ONE).