Fencer Mariel Zagunis has been selected to carry the U.S. flag into the Opening Ceremonies in front of the United States team. She is shown at a news conference on Thursday, July 26, 2012, in London, England. (Vernon Bryant/Dallas Morning News/MCT)
Fencer and United States flag bearer Mariel Zagunis answers questions from the media during a United States Olympic Committee Executive Leadership Conference at the Tower Press Conference Room in London, England. (July 26, 2012)
In both 2004 and 2008, Zagunis was a heavy underdog in sabre. Each Olympics, though, she took home gold. In 2012, she’s a heavy favorite, looking to complete the three-peat.
American Mariel Zagunis, left, competes with Ilaria Bianco of Italy during a women's team sabre match for the bronze medals at the World Fencing Championship in Kiev, Ukraine. (April 13, 2012)
Mariel Zagunis of USA celebrates her final point against Alejandra Benitez of Venezuela in the women's individual sabre gold medal match during the Guadalajara 2011 Pan American Games, at the Fencing stadium in Guadalajara, Mexico, on October 25, 2011. Zagunis won 15-13. AFP PHOTO/OMAR TORRES (Photo credit should read OMAR TORRES/AFP/Getty Images)