Can we beat Brazil in the final?

The USA scored it's first goal in 59 years by defeating Spain in the Confed Cup on Wednesday. They are now in the final. What are their chances of beating Brazil? Was their win against Spain merely a once-off wonder or are they made of the right stuff? America is not known as a soccer playing country. Of course it has riches to purchase players and pay for the best facilities and coaches as well as a strong competitive nature. Bv what is the ingredient that transformed this mediocre team, (on paper), to a world beater? Or was the match fixed to benefit the betting public?