When I passed through Akrotiri in the period 1964-66, the U2s were operated by the CIA. The pilots never socialised and always went everywhere in twos (including, probably, the bog). In 1974 at the time of the Turkish invasion, they were USAF aircraft and the crews, led by Col Gary Powers (not the Gary Powers, or so he said) were very sociable indeed and happy to let us climb over their aircraft.