And also, of those two, only the U2 is still in service. All SR-71s have been sent to museums now, sadly. This includes NASA's which were the last in service, o

And also, of those two, only the U2 is still in service. All SR-71s have been sent to museums now, sadly. This includes NASA's which were the last in service, operated until the mid nineties. Interestingly, NASA _does_ operate a variant of the U2 currently, as the ER-2 [1] high-altitude earth-resources observatory. [1] http://www.nasa.gov/centers/armstrong/news/FactSheets/FS-046-DFRC.html http://www.nasa.gov/centers/armstrong/news/FactSheets/FS-046...