The team of DeeDee Trotter, Allyson Felix, Francena McCorory, and Sanya Richards-Ross finished nearly four seconds ahead of the Russians. Jamaica won the bronze.

Great Britain's Mo Farah gave the home crowd something to cheer about when he won the men's 5,000-meter race earlier in the evening.

Farah is the 5,000-meter world champion and has now doubled his medal haul from the Games, following his win in the 10,000-meter race a week ago. Ethiopia's Dejen Gebremeskel took silver and Kenya's Thomas Pkemei Longosiwa took bronze in the 5,000-meter.

Also Saturday, South Africa's Caster Semenya, the athlete at the center of a gender row three years ago, won the silver in the women's 800-meter final. She was a favorite going into the race along with Russia's Mariya Savinova, who won the gold; fellow Russian Ekaterina Poistogova won the bronze.

With 32 gold medals up for grabs across 15 sports, it was a busy day outside the stadium, too.

The U.S. women's basketball team won its fifth straight Olympic gold medal when it beat France 86-50 in the North Greenwich Arena along the Thames.

Team USA advanced to the final after beating Australia, winner of the bronze.

The first medal for Team USA on Saturday came in the women's mountain bike competition at Hadleigh Farm in Essex, with a bronze for Georgia Gould of Baltimore. Gold went to France's Julie Bresset and silver to Sabine Spitz from Germany. The venue, which made its Olympic debut Saturday, hosts the men's mountain bike event Sunday.

Brazil beat the United States 3-1 in the women's volleyball final in four sets, setting the gold and silver medals, after Japan took the bronze.

The host of the next summer Games in Rio de Janeiro in 2016 and a famously soccer-mad nation, Brazil had hoped for its first Olympic football gold in the men's final at Wembley but instead saw Mexico claim a convincing 2-1 victory.