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US swimmer Michael Phelps sang the national anthem with his gold medal on the podium after winning the men's 100-meter butterfly final during the London 2012 Olympic Games.

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Michael Phelps of the United States swam the 100 butterfly final.

Daniel Ochoa De Olza/Associated press

Runners passed the Olympic flame on Friday.

Jorge Nunez/Associated press

Missy Franklin (left) of the United States and teammate Elizabeth Beisel at the start of the 200-meter backstroke final on Friday.

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The Italian team celebrated after defeating Russia to win the bronze medal in men's sabre team fencing.

Dominic Ebenbichler/REUTERS

Egypt's Khalil K Abir Abdelrahman fell during an attempt in the women's weightlifting competition.

Matt Dunham/Associated press

Latvia's Maris Urtans made an attempt in the shot put.

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From left, Abiodun Oyepitan of Great Britain, Ivet Lalova of Bulgaria, Gloria Asumnu of Nigeria, and Veronica Campbell-Brown of Jamaica competed in the 100-meter event.

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Iryna Kulesha of Belarus won the bronze medal in the women's 75-kg weightlifting competition on Friday.

Damir Sagolj/REUTERS

South Korea's Shin A Lam reacted after being defeated by Germany's Britta Heidemann during the women's epee individual semifinal fencing competition.

REUTERS

A combination picture shows athletes sticking their tongues out during the Games. Top row: (from left) tennis player John Isner from United States, weightlifter Natasha Perdue of Great Britain, and weightlifter Meline Daluzyan of Armenia. Middle row: hurdler David Greene of Great Britain, double trap shooter Peter Robert Russell Wilson of Great Britain, and US swimmer Michael Phelps. Bottom row: shot putter Pavel Lyzhyn of Belarus, weightlifter Junior Sanchez Rivero of Venezuela, and weightlifter Deni Deni of Indonesia.

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Yasuhiro Ueyama of Japan competed on the men's trampoline.

Ng Han Guan/Associated press

Brazil's Juliao Henriques Neto (left) battled Puerto Rico's Jeyvier Contron Ocasio during a men's flyweight preliminary boxing match Friday.

David Goldman/Associated press

Helen Langehanenberg of Germany kissed her horse Damon Hill after they competed in equestrian dressage.

Reinhard Krause/REUTERS

Belarus' Yana Maksimava landed on the mat after her jump during the heptathlon high jump event.

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Sam Bewley, Marc Ryan, Jesse Sergent, and Aaron Gate of New Zealand revved it up in the team pursuit track cycling qualifying event.

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Germany's Tim Grohmann, Lauritz Schoof, Phillipp Wende, and Karl Schulze celebrated after winning gold in the quadruple sculls.

Marko Djurica/REUTERS

Croatia's Vesna Milanovic-Litre (left) and Ivana Lovric challenged Montenegro's Ana Dokic in the women's handball preliminaries.

Francois Mori/Associated press

Lisa Westerhof and Lobke Berkhout of the Netherlands during the 470 women's dinghy race.

Phil Noble/REUTERS

Serbia's Asmir Kolasinac put chalk on his shot put during the men's qualification.

Charles Krupa/Associated press

Turkey's Bahar Caglar drove to the basket against China during a women's basketball game on Friday.

EMMANUEL DUNAND/AFP/Getty Images

Cuba's Idalys Ortiz celebrated winning her women's judo semifinal match. The picture was taken with a robotic camera.

Kim Kyung-Hoon/REUTERS

Brazil's Maria Suelen Altheman battled China's Tong Wen in their bronze medal judo match.

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Nan Zhang (left) and Yunlei Zhao of China celebrated winning the mixed doubles badminton gold medal match against compatriots Chen Xu and Jin Ma of China.

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Sophie Van Gestel of the Netherlands dove for the ball alongside Madelein Meppelink during their women's beach volleyball match with Brazil.

Mark J. Terrill/Associated press

Tania Cagnotto of Italy took the plunge during the women's 3-meter springboard diving preliminaries.

Emilio Morenatti/Associated press

Great Britain's Katherine Grainger (left) and Anna Watkins displayed the gold medals they won in the rowing double sculls in Eton Dorney, near Windsor.