Nairo Quintana successfully attacked Chris Froome on the demanding summit finish of the Spanish Vuelta's eighth stage to take over the lead of the grand tour on Saturday. Sergey Lagutin of Russia won the 181.5-kilometer (113-mile) stage from Villalpando finishing at the category-one La Camperona summit in just over four hours. Quintana claimed the red jersey from fellow Colombian Darwin Atapuma, who fell behind the title favorites on the final ascent, which had gradients reaching 25 percent. More...