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The United States women fencing team, from left, Ibtihaj Muhammad, Dagmara Wozniak and Mariel Zagunis celebrate in the podium after winning the gold medal in the sabre team event at the Pan American Games in Guadalajara, Mexico, Friday, Oct. 28, 2011. (AP Photo/Jorge Saenz)

U.S. flag-bearer Mariel Zagunis

Two-time fencing gold medalist Mariel Zagunis has been chosen as the flag-bearer for the United States in Friday's Opening Ceremony.