3535 - SR-71 Blackbird, s/n #17958. The ultimate airbreathing airplane. This actual aircraft set the world speed record back in 1976.... 2,193.2mph! Nothing has gone faster since. First in service in 1964 from the genius of Kelly Johnson, these aircraft, almost all titanium (imported from Russia... If they only knew!), required new technologies in every way. From how to machine the titanium, to new fluids and fuels that would work in the extreme conditions that she flew in. And all done with most advanced calculators of the day.... sliderules! I don't think we will every see something like this again. It was mounted on blocks up high off the floor. I had to really stretch to touch it, but I did touch it. Wow....