LONDON (AP) -- It has been a golden day for the U.S. The success at the Olympic Stadium in track and field propelled the U.S. back on top of the medal count.
The Americans now have 81 medals to 77 for China. In gold, the U.S. trails China by two, 36-34. The U.S. earned seven medals in track and field alone.
After winning the silver medal in 2004 and 2008, Allyson Felix of the United States has won the Olympic gold medal in the women's 200 meters. She earned the prize by overtaking two-time 100 champion Shelly-Ann Fraser-Pryce of Jamaica down the stretch to win in 21.88 seconds. Felix was behind coming off the turn but powered past Fraser-Pryce over the last 40 meters.
Fraser-Pryce got the silver in 22.09. Carmelita Jeter (JEH'-tur) of the U.S. was third in 22.14 for the bronze, her second medal of the London Games after a silver in the 100.
Aries Merritt led a 1-2 finish for the United States in the Olympic 110-meter hurdles, winning in 12.92 seconds. Jason Richardson, the world champion, was second in 13.04 with Hansle Parchment of Jamaica taking the bronze in 13.12.
Brittney Reese of the U.S. won the gold in the women's long jump. She is just the second U.S. woman to win the event at the Olympics. The two-time world champion went into the competition with the best jump of the season and put down the best mark in the final with 7.12 meters on her second attempt. The only other American women to win the Olympic long jump was Jackie Joyner-Kersee in 1988.
Russia's Elena Sokolova took the silver medal with a best jump of 7.07 meters, and Janay Deloach earned the bronze for the United States at 6.89.
And in beach volleyball, Kerri Walsh Jennings and Misty-May Treanor of the U.S. won their 3rd Olympic gold. They defeated fellow Americans April Ross and Jennifer Kessy, 21-16, 21-16.
It was the Olympic farewell for May-Treanor, who has said she would like to move on.
Kessy and Ross won the silver medal in their Olympic debut.
World record holder Ashton Eaton of the U.S. is the leader after five events of the decathlon. And world champion Trey Hardee of the U.S. is sitting in second place, 220 points behind with five events to go.
Eaton started by running the 100 in 10.35 seconds, an Olympic-record time for a decathlete. He followed that up with the top performance in the long jump and was 11th in the shot put. He was second in the high jump.
Usain (YOO'-sayn) Bolt won his semifinal heat in 20.18 seconds to advance to the finals of the 200 meters. The Jamaican is trying to become the first man with two Olympic golds in the event. The 200 final will include, among others, Bolt's teammate and training partner, Yohan Blake and American Wallace Spearmon.
Three years after being forced to undergo gender tests, South Africa's Caster Semenya made her Olympic debut today in London. She finished second in her 800-meter preliminary heat behind Alysia Montano of the U.S.
Semenya was sidelined for nearly a year while track and field's governing body decided whether to allow her to compete after she won the 2009 world title at age 18. She was tested and eventually cleared to return to action in 2010, then was the runner-up at last year's world championships.
Sarah Attar (uh-TAHR') became the first Saudi woman to compete in Olympic track and field. Wearing a headscarf, longsleeve shirt and leggings, Attar finished last in her 800-meter heat.
Attar is a student at Pepperdine with duel Saudi and U.S. citizenship. She is one of the first two Saudi women ever selected for the Olympics.
These Olympics are over for former world-record holder Asafa (ah-SAH'-fah) Powell of Jamaica. He has been pulled out of the Olympic sprint relay after pulling his left groin during the 100-meter final. The injury is bad enough that his agent says Powell will not compete in any more events this season.