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A media helicopter flies over the pack riding during the 185.5 km twelfth stage of the 101st edition of the Tour de France cycling race on July 17, 2014 between Bourg-en-Bresse and Saint-Etienne, central eastern France. (LIONEL BONAVENTURE/AFP/Getty Images) ( 531708547 )

Italy's Vincenzo Nibali (2ndL) rides in the pack behind his Kazakhstan's Astana teammates during the 185.5 km twelfth stage of the 101st edition of the Tour de France cycling race on July 17, 2014 between Bourg-en-Bresse and Saint-Etienne, central eastern France. (LIONEL BONAVENTURE/AFP/Getty Images) ( 531710088 )

Spectators shield Spain's David De La Cruz Melgarejo from the sun after he crashed when riding in the breakaway in Oingt, during the twelfth stage of the Tour de France cycling race over 185.5 kilometers (115.3 miles) with start in Bourg-en-Bresse and finish in Saint-Etienne, France, Thursday, July 17, 2014. De La cruz had to withdraw from the race because of his injuries. (AP Photo/Christophe Ena) ( Cycling Tour de France )

Spain's David de la Cruz Melgarejo receives medical assistance after a fall during the 185.5 km twelfth stage of the 101st edition of the Tour de France cycling race on July 17, 2014 between Bourg-en-Bresse and Saint-Etienne, central eastern France. (LIONEL BONAVENTURE/AFP/Getty Images) ( 531710599 )

The pack rides past vineyards during the 185.5 km twelfth stage of the 101st edition of the Tour de France cycling race on July 17, 2014 between Bourg-en-Bresse and Saint-Etienne, central eastern France. (LIONEL BONAVENTURE/AFP/Getty Images) ( 531710349 )

One rider holds a drinking bottle with his teeth as the rest of the pack blurs in the heat haze during the twelfth stage of the Tour de France cycling race over 185.5 kilometers (115.3 miles) with start in Bourg-en-Bresse and finish in Saint-Etienne, France, Thursday, July 17, 2014. (AP Photo/Laurent Cipriani) ( Cycling Tour de France )

Italy's Vincenzo Nibali (C) rides in the pack with his Kazakhstan's Astana teammates during the 185.5 km twelfth stage of the 101st edition of the Tour de France cycling race on July 17, 2014 between Bourg-en-Bresse and Saint-Etienne, central eastern France. (LIONEL BONAVENTURE/AFP/Getty Images) ( 531710429 )

Switzerland's Gregory Rast, front, breaks away from the pack, rear, during the twelfth stage of the Tour de France cycling race over 185.5 kilometers (115.3 miles) with start in Bourg-en-Bresse and finish in Saint-Etienne, France, Thursday, July 17, 2014. (AP Photo/Laurent Cipriani) ( Cycling Tour de France )

Alexander Kristoff of Noraway and Team Katusha recovers after winning the twelfth stage of the 2014 Tour de France, a 186km stage between Bourg-en-Bresse and Saint-Etienne, on July 17, 2014 in Saint-Etienne, France. (Photo by Doug Pensinger/Getty Images) ( 452279496 )

Alexander Kristoff of Norway and Team Katusha celebrates winning stage twelve of the 2014 Tour de France, a 186km stage between Bourg-en-Bresse and Saint-Etienne, on July 17, 2014 in Saint-Etienne, France. (Photo by Bryn Lennon/Getty Images) ( 452279448 )