One Question... IF there is a hole at the North Pole... considering there is no LAND at the North Pole, what stops the ocean from draining into that hole?
Now here is a section of a Russian film, but the translation is in German... but watch it anyway... you will see something fascinating... as they say "A picture is worth a thousand words"
http://www.youtube.com/watch?v=oKptS9wby1Y
Also remember this quote from the Byrd document you linked to...
On February, 1947, Rear Admiral Richard E. Byrd of the United States Navy,
before his seven-hour flight of 1,700 miles beyond the North Pole, said,
"I'd like to see that
LAND BEYOND THE POLE. That area beyond the
Pole is the center of the great UNKNOWN."
He is NOT talking about the center of the Earth