U.S. Downhill Skier Lindsey Vonn: Not Competing in 2014 Winter OlympicsU.S. Downhill Skier Lindsey Vonn: Not Competing in 2014 Winter OlympicsBad news, Lindsey Vonn fans: Because of a repetitive knee injury, the gold-medal skier will be unable to compete in this year's Winter Olympics.Cassandra RoseCassandra Rose