Tony Kornheiser and Mike Wilbon like to rant about referees and instant replay, but the fact of the matter is that the United States got a lot of calls in the World Cup, and they still could not make it out of the Round of 16. The disallowed goal against Slovenia had no effect on them as they still won their group, but yeah, it probably was a bad call.
But Landon Donovan flopped more than Anderson Varejao in the team's four games. Anyone from the US who lost the ball fell over and the refs usually called a foul on it. So stop whining!