Not U2, (*** warning, hot take ***) they quit being good after Joshua Tree. I’m talking about U-2, Kelly Johnson’s original high altitude spy plane. The Dragon Lady is just an unreal airplane and I find it utterly fascinating. Yes, the NASA planes are considered ER-2's, but they are the same plane with different paint and sensor packages.
If you want some more U-2 footage check out Mythbusters S15, E8, “Flights of Fantasy”. It can be found in many places on the interwebs, though I won’t speak to the legality of the various available copies of that particular episode.