One of the doc channels interviewed a former crewman: "...and in half an hour, we were turning around at the Canadian border to go back to Edwards..."
They should have built a hundred of them.
The intel that Russia had finished and used a new SAM to shoot down Gary Powers was bogus.
Wikipedia still has it wrong that he was shot down by a SAM.
A JATO unit affixed to a soviet jet gave it the boost to reach him and the near collission collapsed a wing of the U-2.