American adventure-athlete Colin O'Brady, 33, and British Army Captain Louis Rudd, 49, embarked on the perilous, 921-mile trek on Oct. 31 — both carrying sleeping bags, freeze-dried food, cross-country skis, hand-held satellite phones and modems, a GPS tracker and portable solar panels. In order for the journey to be considered unsupported, the competitors cannot accept any help from the few people they might encounter, not even a cup of hot tea. They have, however, raised north of $200,000 each from corporate sponsors and private donors in an effort to help with their trip.According to the New York Times, the last person to...