The rubber tracks (3) allow the Viking to travel over soft terrain such as desert, snow or mud because its load is evenly distributed over all four tracks, all of which are driven.
In Texas, where Amarillo saw 19 inches of snow Monday, fierce winds whipped snow into whiteout conditions that left truck driver and CNN iReporter Phillip Prince -- carrying a load of frozen pizzas -- stranded on Interstate 40 near Groom for nine hours.