In 1947, the Secretary of the Navy, James Forrestal
sent a naval task force to Antarctica, including
Admiral Nimitz, Admiral Krusen and Admiral Byrd,
in a mission called "Operation Highjump."
It was alleged to be an expedition to find "coal
deposits" and other valuable resources, but according
to pervasive urban legends, it was actually looking for
an underground colony of Nazis called Neuschwabenland.
This is the official film produced by the US Navy.