I saw one up close at the Pima air museum. There’s a few out there to go see close now. I saw one at a distance at an air show at Carswell AFB around 1970.
They made a big show of keeping it in a hanger 100 yards or so away with the doors open. Air police all around it with AR-15’s.
But I’ve still never seen a U-2.
Very cool.
Was privileged to see a pre-dawn takeoff from the flight line near the T/O end of the runway. The climb was so rapid that the U-2 was up into the sunlight -- seemingly before it reached the other end of the runway!
Jaw-dropping -- until I saw a RB-57F takeoff...
Nice!