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Lindsey Vonn is being lifted by a helicopter during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
AP Photo/Kerstin Joensson
Slovenia's Tina Maze reacts as she see United States' Lindsey Vonn crashing during the women's super-G at the Alpine skiing world championships in Schladming, Austria, Tuesday, Feb.5,2013.
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Lindsey Vonn is transported by helicopter after a fall during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
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Lindsay Vonn is airlifted off the mountain after crashing while competing in the women's Super-G event during the Alpine FIS Ski World Championships on Feb. 5, 2013, in Schladming, Austria.
AP Photo/Luca Bruno
In this photo taken Sunday, Feb. 3, 2013, U.S. ski racer Lindsey Vonn attends a press conference in Schladming, Austria.
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Lindsey Vonn is evacuated by a helicopter after falling during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
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Tina Maze of Slovenia reacts in the finish area to the crash of Lindsay Vonn in the women's Super-G event during the Alpine FIS Ski World Championships on Feb. 5, 2013, in Schladming, Austria.
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Lindsey Vonn competes during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
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Lindsey Vonn is evacuated by a helicopter after falling during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
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Lindsey Vonn competes during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
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Lindsey Vonn is helicoptered off the course during the Audi FIS Alpine Ski World Championships women's Super-G on Feb. 5, 2013, in Schladming, Austria.
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Lindsay Vonn of the United States of America skis before crashing while competing in the women's Super-G event during the Alpine FIS Ski World Championships on Feb. 5, 2013, in Schladming, Austria.
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Lindsay Vonn of the United States of America skis before crashing while competing in the women's Super-G event during the Alpine FIS Ski World Championships on Feb. 5, 2013, in Schladming, Austria.
Fabrice Coffrini/AFP/Getty Images
Lindsey Vonn competes during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
Olivier Morin/AFP/Getty Images
Lindsey Vonn is evacuated by a helicopter after falling during the women's Super-G event of the 2013 Ski World Championships in Schladming, Austria on Feb. 5, 2013.
Christophe Pallot/Agence Zoom/Getty Images
Lindsey Vonn of the USA is helicoptered off the course during the Audi FIS Alpine Ski World Championships women's Super-G on Feb. 5, 2013, in Schladming, Austria.