(Reuters) - United States teenage substitute Christian Pulisic scored a second-half double in a 6-0 rout of St Vincent and the Grenadines as they moved to the verge of the final CONCACAF World Cup qualifying round on Friday. Three first-half goals had put the result beyond doubt, though the visitors were exposed several times defensively by the plucky team from the small Caribbean island nation of barely 100,000 people. German-based Bobby Wood opened the scoring in the 28th minute when he curled a shot into the far corner from just outside the box at the Arnos Vale cricket ground in Kingstown. More...