U-2 Can Be a Pilot
As I remember, all U-2 pilots are volunteers who must apply and be accepted for the program. Typical applicants have flown one Major Weapon System and hold the rank of Captain (though they usually Instructors or Evaluators on their aircraft).
Once selected (don't know how many apply each year), the applicants travel to California for Interviews, Physicals, and Flight Evaluations in the two-seat U-2 (it's very difficult to land).
One of the guys from our Squadron ended up in the program, but I haven't heard from him in years.
I wish you succees!