Before the SR-71 was operated by the U.S. Air Force and known to the public, it was a highly classified airplane designed and operated by the CIA. Designated the A-12 Oxcart, it was more or less the same fast-and-beautiful Blackbird we all know and love.
Like the Blackbird, the Oxcart was used for high-altitude reconnaissance. This particular incident involved an Oxcart losing an engine while reconnoitering over North Vietnam, causing the pilot to have to set her down at a U-2 facility in Thailand not equipped for the A-12. The efforts made to secure, store, repair, and return the Oxcart to her operational base were a logistical triumph and one from which the CIA learned a great deal. Click on over and check it out.