There are a lot of dangers. We have avalanches. We have the dangers of the Arctic blizzards which are, in many ways, the most fearsome. Many people freeze to death every year who travel in those countries. No one has ever frozen to death in the race, but this happens typically with the local people, so we know that it is extremely dangerous. The open water is perhaps the thing we fear the most, or the thin ice. In 1984 I can tell a story of being ten miles away from a checkpoint village, an Eskimo village of Shaktoolik. I was traveling on some salt water ice, and I was quite a ways off land. And all of a sudden I realized that the ice was billowing around me. And so, just as I realized how dangerous it was, I gave the dogs the command to turn towards land, just as my sled broke through. So I went under, broke through, the successive dogs right in front of the sled broke through because of the weight of my sled. But the lead dogs and a couple pairs behind them were able to stay up on the hard ice and slowly but surely pull the rest of us out. It was probably about 30 below, and there is not one blade of grass out there. There is nothing to start a fire with to warm us up or dry us off.