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Lance Armstrong of the USA and Astana trains with his team on the second rest day of the 2009 Tour de France on July 20, 2009 in Sion, Switzerland.
Tour de France leader Alberto Contador and second-place teammate Lance Armstrong have started on the 16th stage of the race, which goes into the Swiss Alps.
The pack is heading on a 98.8-mile ride from Martigny to Bourg-Saint-Maurice, France, via Italy and up the Grand-Saint-Bernard and Petit-Saint-Bernard passes.
Tuesday's stage follows the second and final rest day in the three-week race. Contador, the 2007 Tour champion, stamped his dominance on the race Sunday by winning the first stage in the Alps. Seven-time champion Armstrong is 1 minute, 37 seconds behind his Astana teammate.
The Tour finishes on July 26 in Paris.