I was stationed in Thailand, near Utapao AFB, back in the later days of Nam. The SR-71 and the U-2 were active then. Watching them take off and land was a real treat...nothing like at the air shows where they tame it down a lot.
Here's a neat YouTube vid of a guy getting a ride in a U-2 trainer:
http://www.youtube.com/watch?v=kJoMDq4AyLc
(tried to embed but seems not to work on my Mac)