U-2/Po-2? i think both designations are correct, not sure though, you are correct though ra, they build LOADS of these things. They could be used for training, reconaisance, transport, medivac, and most famously, the "Night Witches Role" I believe women flew the night witch role but i'm not sure, basicially they used these to attack at night I also heard they were called the night B1tches because of their tendency to aim for the pilot.
Another interesting fact is that U-2s were used in the Vietnam war by the North Vietnamese due to the fact the thing went so slow no plane in the airforce could engage it at the low/slow altitudes it flew at. The F-4s simply couldn't fly that low and slow without stalling out.
