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New here, so, hope I'm not butting in to the conversation too much. But, could Beale or Tonopah be candidates for this?
reply to post by JohnnySasaki
. There's also the fact that the T model KC-135's are still in use and were used for a project out of Edwards around the same timeframe as this. This leads me to believe that they were working on a replacement before retiring the SR-71.