In 1947 Admiral Byrd led an American Military Expedition into the antarctic.
They had provicions for at least half a year, but after two months, the expedition returned to America, all shot to peaces.
With the loss of some ships, and many airplanes from the aircraft carrier Cassablanca.
The exact details, about what happend, were never revealed!
One of the marines aboard the Cassablanca told how the convoy was attacked by circular flying objects who emerged from the water and flew silently while they spat beams of fire.The documentary is in german but the images speak for themselves.