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An athlete stands at the shooting range in heavy fog prior to the Biathlon Men's 15km Mass Start competition at Laura Cross Country and Biathlon Center at the Sochi 2014 Olympic Games, Krasnaya Polyana, Russia, 16 February 2014. EPA/ROLAND SCHLAGER ( RUSSIA SOCHI 2014 OLYMPIC GAMES )

A volunteer waits for a decision on the postponing of the men's biathlon 15K mass start race at the 2014 Winter Olympics, Sunday, Feb. 16, 2014, in Krasnaya Polyana, Russia. (AP Photo/Gregorio Borgia) ( APTOPIX Sochi Olympics Biathlon Men )

Athletes warm up in heavy fog prior to the Men's Biathlon 15km competition at Laura Cross Country and Biathlon Center at the Sochi 2014 Olympic Games, Krasnaya Polyana, Russia, 16 February 2014. Men's 15km mass start has been postponed to Monday, 17 February it was announced. EPA/HENDRIK SCHMIDT ( RUSSIA SOCHI 2014 OLYMPIC GAMES )

Two athletes train as the men's biathlon 15K mass start was postponed until monday morning because of low visibility, at the 2014 Winter Olympics, Sunday, Feb. 16, 2014, in Krasnaya Polyana, Russia. (AP Photo/Gregorio Borgia) ( Sochi Olympics Biathlon Men )

Members of the Swedish team test the track as the Men's Biathlon 15 km Mass Start has been delayed due to a heavy fog at the Laura Cross-Country Ski and Biathlon Center during the Sochi Winter Olympics on February 16, 2014, in Rosa Khutor, near Sochi. ALBERTO PIZZOLI/AFP/Getty Images ( 527141989 )

Athletes ski through the fog as the men's biathlon 15K mass start race has been postponed due to the lack of visibility at the 2014 Winter Olympics, Sunday, Feb. 16, 2014, in Krasnaya Polyana, Russia. (AP Photo/Gregorio Borgia) ( Sochi Olympics Biathlon Men )

A Swedish biathlete warms up for in the Men's 15 km Mass Start during day nine of the Sochi 2014 Winter Olympics at Laura Cross-country Ski & Biathlon Center on February 16, 2014 in Sochi, Russia. (Photo by Clive Mason/Getty Images) ( 469710113 )

A spectator takes pictures of heavy fog prior to the Men's Biathlon 15km competition at Laura Cross Country and Biathlon Center at the Sochi 2014 Olympic Games, Krasnaya Polyana, Russia, 16 February 2014. Men's 15km mass start has been postponed to Monday, 17 February it was announced. EPA/FILIP SINGER ( RUSSIA SOCHI 2014 OLYMPIC GAMES )

Gondolas are shrouded in fog as the travel between between biathlon and cross country skiing venues and the community below at the Sochi 2014 Winter Olympics, Sunday, Feb. 16, 2014, in Krasnaya Polyana, Russia. (AP Photo/Charlie Riedel) ( Sochi Olympics Alpine Skiing Men )

A biathlete warms up for in the Men's 15 km Mass Start during day nine of the Sochi 2014 Winter Olympics at Laura Cross-country Ski & Biathlon Center on February 16, 2014 in Sochi, Russia. (Photo by Clive Mason/Getty Images) ( 469710141 )

A competitor checks the visibility through his rifle sights before the competition was postponed due to fog before the Men's 15 km Mass Start during day nine of the Sochi 2014 Winter Olympics at Laura Cross-country Ski & Biathlon Center on February 16, 2014 in Sochi, Russia. (Photo by Richard Heathcote/Getty Images) ( 469710561 )

A race officer stands in the shooting range after the men's biathlon 15k mass start was postponed for one day because of fog, at the 2014 Winter Olympics, Sunday, Feb. 16, 2014, in Krasnaya Polyana, Russia. (AP Photo/Kirsty Wigglesworth) ( Sochi Olympics Biathlon Men )

Venue referees walk along the shooting range heavy fog prior to the Men's Biathlon 15km competition at Laura Cross Country and Biathlon Center at the Sochi 2014 Olympic Games, Krasnaya Polyana, Russia, 16 February 2014. Men's 15km mass start has been postponed to Monday, 17 February it was announced. EPA/FILIP SINGER ( RUSSIA SOCHI 2014 OLYMPIC GAMES )

Volunteers transport snow to prepare the shooting range as the Men's Biathlon 15 km Mass Start has been postponed until the next day due to fog at the Laura Cross-Country Ski and Biathlon Center during the Sochi Winter Olympics on February 16, 2014, in Rosa Khutor, near Sochi. KIRILL KUDRYAVTSEV/AFP/Getty Images ( 527145249 )

Volunteers play in the snow prior to the men's biathlon 15K mass start race at the 2014 Winter Olympics, Sunday, Feb. 16, 2014, in Krasnaya Polyana, Russia. The men's biathlon 15-kilometer mass-start race at the Sochi Olympics has been postponed for one day because of fog. (AP Photo/Dmitry Lovetsky) ( Sochi Olympics Biathlon Men )

A skier pass by the shooting range as the Men's Biathlon 15 km Mass Start has been postponed until the next day due to fog at the Laura Cross-Country Ski and Biathlon Center during the Sochi Winter Olympics on February 16, 2014, in Rosa Khutor, near Sochi. KIRILL KUDRYAVTSEV/AFP/Getty Images ( 527145354 )

Members of the Swedish team arrive at the track as the Men's Biathlon 15 km Mass Start is delayed due to a heavy fog at the Laura Cross-Country Ski and Biathlon Center during the Sochi Winter Olympics on February 16, 2014, in Rosa Khutor, near Sochi. The race was cancelled due to bad weather conditions. KIRILL KUDRYAVTSEV/AFP/Getty Images ( 527143840 )