Serena and Venus Williams won their third doubles title at the London Olympics on Sunday and they also made history as the first pair to win the women's doubles three times. The sisters first won the doubles at Sydney in 2000, then again in Beijing in 2008 after missing Athens because of an injury to Serena. And Venus doesn't have any plans of stopping she says, "We're definitely planning on Rio. We're going out with a bang in Rio. Hopefully we will make it four, you never know."