I watched another very interesting documentary the other day, as well, Running the Sahara. It was about three men who ran 4300 miles in 111 days across the Sahara desert. The film was inspiring because it shows how great things can be accomplished if you want it enough and are determined. They had to take several days off due to a few injuries and political problems when attempting to cross into some of the countries, but on the days they ran they averaged 50 miles a day.