The two pictures above were taken in Antarctica during the month of October. The runway is about 5 1/2 feet of ice over about 1,300 ft of water. When it gets too thin the planes land at a different location and the ice breakers come in to clear the way for ships to bring in cargo. It was a balmy minus 35 degrees when this picture was taken and the center windshield cracked when we turned off the windshield heat after landing. Even when cracked they are still very strong as they are made up of 4 layers about 3 inches thick. The bottom picture shows all the ice on the land, glaciers for miles. A bit of Trivia, about 80% of all fresh water composes the ice in Antarctica.