Audi trio Loic Duval, Allan McNish and Tom Kristensen claimed victory at Circuit of The Americas to extend their World Endurance Championship lead.The No. 2 Audi R18 e-tron quattro triumphed by 23 seconds over the second-placed Toyota TS030 HYBRID shared by Sebastien Buemi, Stephane Sarrazin and Anthony Davidson.The Audi was...