This is a new YouTube video out… a man who has flown many times coast to coast. He talked to a uniformed pilot in the back of the airline. He asked this pilot if he ever has taken polar flights. This pilot had worked for SAS (Scandinavian) Airlines The pilot said you can not fly directly over the north pole because there is a big enormous hole up there.
http://www.youtube.com/watch?v=_oqkvOL08lI
The pilot says if you try to go further into the hole, over a lip, all the instrumentation goes haywire, so they fly around the poles. The pilot also told him, he would refuse to admit anything he told him was true, and he would deny he said it. This pilot now works for Delta Airlines, and doesn’t want to lose his job.