US Debbie Dunn, Allyson Felix, Lashinda Demus and Sanya Richards celebrate after winning the women's 4x400m relay final of the 2009 IAAF Athletics World Championships in Berlin, capital of Germany, August 23, 2009.(Xinhua Photo) Photo Gallery>>>

    BERLIN, Aug. 23 (Xinhua) -- Allyson Felix won her second gold at the 12th world athletics championships after the U.S. team took the women's 4x400 meters relay here on Sunday.

    Felix, who won her third successive women's 200 meters title last Friday, ran the second leg in the relay. The U.S. women won in3:17.83, ahead of Jamaica (3:21.15) and Russia (3:21.64).