American swimmer Dara Torres jumps off the blocks at the National Aquatics Center, namely the Water Cube, in Beijing, China, Aug. 4, 2008. (Xinhua/Zhao Peng)

American swimmer Margaret Hoelzer trains at the National Aquatics Center, namely the Water Cube, in Beijing, China, Aug. 4, 2008. (Xinhua/Wang Dingchang)

American swimmer Peter Vanderkaay (R) and his teammate train at the National Aquatics Center, namely the Water Cube, in Beijing, China, Aug. 4, 2008. (Xinhua/Wang Dingchang)

American swimmer Margaret Hoelzer (below) trains at the National Aquatics Center, namely the Water Cube, in Beijing, China, Aug. 4, 2008. (Xinhua/Wang Dingchang)

American swimmer Caroline Burckle trains at the National Aquatics Center, namely the Water Cube, in Beijing, China, Aug. 4, 2008. (Xinhua/Wang Dingchang)

American swimmer Cullen Jones(L) trains with his teammates at the National Aquatics Center, namely the Water Cube, in Beijing, China, Aug. 4, 2008. (Xinhua/Wang Dingchang)

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