JFK's bomb shelter on Peanut Island...

Of all the presidents who served during the Cold War, Kennedy was the strongest proponent of sheltering citizens from atomic attack. Before the Cuban missile crisis, Kennedy called navy assistant secretary Paul Fay to ask if he had built a bomb shelter for his family. "No," Fay answered jokingly, "I built a swimming pool instead." "You made a mistake," JFK responded. As Fay recalled, "He was dead serious."

-via Metropolis Magazine