Mariel Zagunis (R) of the US fights with Italy's Gioia Marzocca during the match for Bronze of the Women's Team Sabre competition at the 2012 World Fencing Championships in Kiev on April 13, 2011. USA womens team won the Bronze medals of the championship. AFP PHOTO/ SERGEI SUPINSKY (Photo credit should read SERGEI SUPINSKY/AFP/Getty Images)
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.