Top 10 fly by's

That was not the north pole, it was in Greenland, called Kee Bird:

http://en.wikipedia.org/wiki/Kee_Bird

and it's tale of woe is truely sad. A man died during the ordeal, and there is a huge controversy over whether those involved were simply not careful enough---the fire was caused by a jerry-rigged APU in the rear of the aircraft.

Kee Bird's end was an accident. B-29's have alot of electical to operate and the only way to do it on the ground is with Auxillary Power Units. The rear APU wasn't taking gas from the main tanks so a fuel can was rigged above it to gravity feed it. On the final high speed taxi test the fuel can came loose and spilled fuel on the APU. The resulting fire destroyed the airframe.

Most Superfortresses were scrapped after the Korean Conflict. Some were converted to weather duty with the Air Force. Following that they were transferred to the Navy who sent them to China Lake for target practice.
Others were sent to the Aberdeen Proving Grounds for the same purpose.

I believe that both FiFi and Doc are from China Lake.