Current version of the U-2 is the U-2S and is a vastly different airplane than the original. Current users are CIA and NASA. Though both usually use Air Force pilots and support. Interesting fact is at altitude it flies in a speed window of some 12 mph between a stall and over stressing the airframe. Really just a big glider.

Always wanted to build a model of one and fly it FPV. See how high and far I could get it.