Craig Ahrens, left, watches his son, Dirk, 25, maneuver a parafoil Tuesday in the Mendenhall Wetlands. Although temperatures have been unseasonally mild, Dirk Ahrens still has his mind set on snowfall when he plans to use a larger parafoil for downhill snowboarding. Parafoils are large sails that can pull people across fields and even lift them off the ground if enough wind power is available.
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