The Americans Misty May-Treanor and Kerri Walsh Jennings had to come from way behind in both sets, but they did so and beat the team from China. MMT and KWJ are in the finals for their third straight Olympic games.
The video is from AP.
Update: It will be an all-American final, with April Ross and Jennifer Kess grabbing the other spot after beating Brazil's Juliana and Larissa.