Diego Luna and Malik Tillman. —AFP/FileLos Angeles, United States: The United States ended their four-match losing run with a resounding 5-0 win over Trinidad and Tobago in their opening game of the CONCACAF Gold Cup on Sunday in San Jose.Mauricio Pochettino and his team, which is missing several Europe-based regulars, had faced plenty of criticism after recent friendly defeats to Turkey and Switzerland. In desperate need of a change in mood around the team, a year out from the World Cup...