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South Korea and United States players in action during their ice sledge hockey match at the 2014 Winter Paralympics in Sochi, Russia, Sunday March 9, 2014. United States won the match 3-0. (AP Photo/Pavel Golovkin) ( Sochi Paralympics )

Toby Kane of Australia competes in the men's super-G standing race at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia, on March 9, 2014. EPA/ENNIO LEANZA ( RUSSIA SOCHI 2014 PARALYMPIC GAMES )

Gregor Ewan of Great Britain smiles during round robin session wheelchair curling match against South Korea at the 2014 Winter Paralympics in Sochi, Russia, Sunday, March 9, 2014. Great Britain won 8-4. (AP Photo/Pavel Golovkin) ( APTOPIX Sochi Paralympics )

Graeme Murray of Canada, top, and Emil Kirstistuen of Norway in action during an ice sledge hockey match between Canada and Norway at the 2014 Winter Paralympics in Sochi, Russia, Sunday, March 9, 2014. Canada won 4-0. (AP Photo/Pavel Golovkin) ( Sochi Paralympics )

Russian soldiers prepair the flags of the USA (L) and Russia during a medal ceremony at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia, on March 9, 2014. EPA/ENNIO LEANZA ( RUSSIA SOCHI 2014 PARALYMPIC GAMES )

Russia's Roman Petushkov (R) competes to the first place during the Men's 15 km Cross-Country Ski Sitting at XI Paralympic Olympic games in the Rosa Khutor stadium nearSochi on March 9, 2014. KIRILL KUDRYAVTSEV/AFP/Getty Images ( 527891135 )

Sweden's Kicki Ulander, right, steadies the chair of Patrik Kallin during round robin session wheelchair curling match against Canada at the 2014 Winter Paralympics in Sochi, Russia, Sunday, March 9, 2014. Canada won 7-4. (AP Photo/Pavel Golovkin) ( Sochi Paralympics )

Nikko Landeros of USA takes a tumble during the Ice Sledge Hockey Preliminary Round Group B match between the USA and Korea at Shayba Arena on March 9, 2014 in Sochi, Russia. (Photo by Harry Engels/Getty Images) ( 477418241 )

Russia's Svetlana Konovalova competes to get third place during Women's 12 km Cross-Country Ski Sitting at XI Paralympic Olympic games in the Rosa Khutor stadium near Sochi on March 9, 2014. KIRILL KUDRYAVTSEV/AFP/Getty Images ( 527892060 )

Russian President Vladimir Putin (foreground) watches a men's Alpine skiing event at the Rosa Khutor centre at the Sochi 2014 Winter Paralympics on March 9, 2014. ALEXEY NIKOLSKY/AFP/Getty Images ( 527891615 )

Switzerland's Maurizio Nicoli competes in the men's super-G sitting race at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia, on March 9, 2014. EPA/ENNIO LEANZA ( RUSSIA SOCHI 2014 PARALYMPIC GAMES )

Canadian Braydon Luscombe during in the men's super-G standing race at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia,. EPA/ENNIO LEANZA ( RUSSIA SOCH 2014 PARALYMPIC GAMES )

A Russian honor guard soldier salutes the national Ukrainian flag lifted in honor Vitaly Lukyanenko of Ukraine, winner of the men's biathlon men's 7.5km, visually impaired event during medal ceremony at the 2014 Winter Paralympic, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky) ( Sochi Paralympics )

Daniel Cnossen of the United States crashes during the men's 15-kilometer cross country ski sitting event at the 2014 Winter Paralympics, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky) ( Sochi Paralympics Cross Country Men )

Hiraku Misawa of Japan competes in the men's Super-G standing race at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia. EPA/VASSIL DONEV ( RUSSIA SOCHI 2014 PARALYMPIC GAMES )

Taiki Morii of Japan competes in the men's Super-G sitting race at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia. EPA/Julian Stratenschulte ( RUSSIA SOCHI 2014 PARALYMPIC GAMES )

Anja Wicker of Germany races during the ladies 12km cross country ski, sitting event at the 2014 Winter Paralympic, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky) ( Sochi Paralympics Cross Country Ladies )

Matthias Lanzinger of Austria competes in the men's Super-G standing race at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia. EPA/VASSIL DONEV ( RUSSIA SOCHI 2014 PARALYMPIC GAMES )

Aaron Pike of United States races during the 15km men's cross country ski, sitting event at the 2014 Winter Paralympic, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky) ( Sochi Paralympics Cross Country Men )

Birgit Skarstein of Norway races during the ladies 12km cross country ski, sitting event at the 2014 Winter Paralympic, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky) ( Sochi Paralympics Cross Country Ladies )

Sebastien Fortier of Canada crashes during the men's 15-kilometer cross country ski sitting event at the 2014 Winter Paralympics, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky) ( Sochi Paralympics Cross Country Men )

Oksana Masters of the United States races to win the silver medal in the ladies 12-kilometer cross country ski sitting event at the 2014 Winter Paralympics, Sunday, March 9, 2014, in Krasnaya Polyana, Russia. (AP Photo/Dmitry Lovetsky) ( Sochi Paralympics Cross Country Ladies )

Russia's Roman Petushkov competes to the first place during Men's 15 km Cross-Country Ski Sitting at XI Paralympic Olympic games in the Rosa Khutor stadium near Sochi on March 9, 2014. KIRILL KUDRYAVTSEV/AFP/Getty Images ( 527891137 )

Austrian Thomas Grochar during in the men's super-G standing race at the Winter Paralympics 2014 Sochi in Krasnaya Polyana, Russia. EPA/ENNIO LEANZA ( epaselect RUSSIA SOCH 2014 PARALYMPIC GAMES )

Bronze medalist Oksana Shyshkova (R) and guide Lada Nesterenko (L) of Ukraine cover their bronze medals after winning the Women's 6km visually impared biathlon during the Sochi 2014 Paralympic Games on March 9, 2014 in Sochi, Russia. (Photo by Ian Walton/Getty Images) ( 477418785 )