start into a winning finish. next weather talent appears at wx center with generic >> pelley: finally tonight, they did it! on san francisco bay, team u.s.a beat new zealand today to retain the america's cup with one of the greatest comebacks. after trailing eight races to one, the americans won eight in a row to finish 9-8. bill whitaker has more on how they did it. >> reporter: just a week ago, team u.s.a. looked like they were sunk, but they replaced a key crew member, tweaked tactics and won seven races in a row. >> this is it, this is it! >> reporter: in today's do-or-