I saw the SR-72 depart HNL, two consecutive nights, circa 1992.  The HI Air Guard F-15s did a great job trying to hide the -72 in a "diamond departure", "flight of four" aircraft, using the reef runway.  The stars in the middle of the formation "disappeared" so I gave the stunt a "fail".  I met the Lt. Col. pilot at the Ilikai.  Interesting convo.  I can NOT remember a single word he said.