Mauricio Pochettino says rebuilding US team is tougher than he imagined, but he's making progress

How coach Mauricio Pochettino made believers out of the U.S. World Cup team

Pochettino was the biggest name the U.S. men's soccer team had ever hired. His rebuild was bumpy at times — but now, with the U.S. headed to the World Cup knockout stage, the players are all in.