Olympics: Photos on day 12

Usain Bolt adds the 200m crown to his 100m Olympic title as he demolishes the field in a memorable final Photograph: Tom Jenkins/Guardian

The Jamaican is overjoyed as he realises he has beaten Michael Johnson's 200m world record. Bolt knocked 2/100ths off the record by finishing in 19.30 seconds despite racing into a headwind Photograph: Tom Jenkins/Guardian

A silhouette of a rider as he jumps through the air in the men's BMX seeding phase at the Laoshan Bicycle Moto Cross Venue Photograph: Julian Finney/Getty

South Africa's Natalie du Toit, centre, prepares to compete in the women's swimming 10km marathon final Photograph: Manan Vatsyayana/AFP

Yulis Gabriel Mercedes of Dominican Republic, blue, fights with Pedro Povoa of Portugal in the taekwondo Men's 58kg Preliminary Round Photograph: Shaun Botterill/Getty

Fabio Magalhaes and Marcio Araujo of Brazil embrace after their 2-0 win in the men's semi-final beach volleyball match over Emanuel Rego and Ricardo Santos of Brazil Photograph: Cameron Spencer/Getty

Players from the USA celebrate after Crystl Bustos hit a three-run home run to give them a 4-0 lead against Japan in the women's semi-final softball event Photograph: Clive Rose/Getty

The competitors dive into the water at the start of the women's marathon 10km swimming event at the Shunyi Olympic Rowing-Canoeing Park Photograph: Nick Laham/Getty

Lee Seonok of South Korea is challenged by Sachimi Iwao of Japan during their women's classification hockey match against Korea Photograph: Quinn Rooney/Getty

Sammy Cools of Canada is watched by spectators from the stands Photograph: Julian Finney/Getty

Blessing Okagbare of Nigeria competes in the women's long jump qualifying round Photograph: Alexander Hassenstein/Getty

Andrea Fuentes and Gemma Mengual of Spain perform in the synchronised swimming duet free routine final Photograph: Issei Kato/Reuters

The National Sports Aerobics Group of China performs during a gala show as part of the Olympics Photograph: Odd Andersen/AP

China's gold medal winning gymnast Chen Yibing performs at the rings during the gala Photograph: Odd Andersen/AP