" wrote in
ups.com:

Moments ago at 11:20am EDT (1520z), WB-57F "NASA 926" departed
Patrick AFB and began his spiral to his FL560-FL590 altitude block. He
will be rehearsing his role for Saturday's Shuttle launch, during which
he will photograph the orbiter to determine if there was any damage
during the liftoff.
You should be able to track NASA 926 today at:
http://flightaware.com/live/flight/NASA926

There was a piece on-line about the retirement of the RAF's
last Canberras after 55 years.