Athletes march at Olympic Opening Ceremony

Mariel Zagunis of the United States Olympic fencing team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Members of the United States Olympic team enter the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Athletes from the United States parade into the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Members of the United States Olympic team enter the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Sir Chris Hoy of the Great Britain Olympic cycling team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

The Argentina team walk into the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Lauren Jackson of the Australia Olympic basketball team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

The Australian team walk into the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Markus Rogan of the Austrian Olympic swimming team carries his country's flag as he leads the Austrian team into the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Members of the Australia team parde into the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Lauren Jackson of the Australia Olympic basketball team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

The Australian team walk into the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Luciana Aymar of the Argentina Olympic hockey team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Simon Whitfield of the Canada Olympic triathlon team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Alexandros Nikolaidis of the Greece Olympic taekwondo team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Markus Rogan of the Austrian Olympic swimming team carries his country's flag as he leads the Austrian team into the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Jianlian Yi of the China Olympic basketball team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Natascha Keller of the Germany Olympic hockey team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Jianlian Yi of the China Olympic basketball team carries his countires flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Reigning Olympic Men's 100m and 200m champion Usain Bolt of the Jamaica Olympic athletics team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Hanna-Maria Seppala of the Finland Olympic swimming team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Saori Yoshida of the Japan Olympic wrestling team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Laura Flessel-Colovic of the France Olympic fencing team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Independent Olympic athletes enter the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Laura Flessel-Colovic of the France Olympic fencing team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Members of the Brazilian Olympic team enter the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Venio Losert of the Croatia Olympic handball team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Sushil Kumar of the India Olympic wrestling team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Wai Sze Lee of the Hong Kong China Olympic cycling team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Reigning Olympic Men's 100m and 200m champion Usain Bolt of the Jamaica Olympic athletics team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Hanna-Maria Seppala of the Finland Olympic swimming team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Novak Djokovic of the Serbia Olympic tennis team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Usain Bolt of the Jamaica Olympic athletics team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Natascha Keller of the Germany Olympic hockey team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Athletes from the German team parade during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Athletes from the China delegation wave as they parade during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Members of the French Olympic team enter the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Katie Taylor of Ireland carries her country's flag the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Katie Taylor of the Ireland Olympic boxing team carries her country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Members of the Japan Olympic team enter the stadium during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Markus Rogan of the Austria Olympic swimming team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Novak Djokovic of the Serbia Olympic tennis team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Chris Hoy of Great Britain Olympic carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

Novak Djokovic of the Serbia Olympic tennis team carries his country's flag during the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012.

London 2012 Olympics in pictures