Winter X Games, 冬季極限運動比賽

 Racers compete in the SnoCross finals during the Winter X Games on Sunday, Jan. 27, 2013, at Buttermilk Mountain in Aspen, Colo. (AP Photo/The Gazette, Michael Ciaglo)
Crashes raise concerns at Winter X Games | www.ktvu.com http://www.ktvu.com/ap/ap/health/crashes-raise-concerns-at-winter-x-games/nWBNR/

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