EBR-1 Idaho

In the 1950's an attempt was made to build atomic powered bombers that could remain aloft for extended periods, before ballistic missiles were perfected. They were so big that they would have required a 10 mile runway (hence the eastern Idaho location). The pilots would have received a fairly large dose of radiation, because good shielding would have been too heavy to fly, and there were the obvious safety problems with airborne reactors.