DEL MAR, CA -- Sierra Leone (Gun Runner), a painful second in the GI Kentucky Derby and a frustrating, beaten favorite in three subsequent efforts at Saratoga this summer, emulated his leading young sire with a victory on the biggest stage of them all in Saturday's GI Longines Breeders' Cup Classic at Del Mar. The GI Toyota Blue Grass S. winner and 'TDN Rising Star' took advantage of a lightning-fast pace up front, picked off his rivals with an eye-catching, sweeping move on the final turn and outbattled favored 'Rising...