Without the trusty KC-135Q (and now the KC-135T) and the crews that fly and maintain these aircraft, the SR-71 couldn't complete the recce mission that it was built for. There were only a few of these units scattered around the world, let look at the patches they wore.

These are in numerical order of the units, I'll try and get a short unit history on each unit up soon! Also the patches are the actual size unless noted.