4x100-meter relay 2012 Olympics: Carmelita Jeter, Tianna Madison, Allyson Felix, Bianca Knight win

 LONDON (AP) -- Carmelita Jeter crossed the finish line pointing the baton at the clock showing a world record of 40.82 seconds Friday night as the United States won the women's Olympic 4x100-meter relay for the first time since 1996.

   Tianna Madison, 200-meter champion Allyson Felix and Bianca Knight gave the U.S. a big lead heading into the anchor leg by Jeter, the 100 silver medalist.

   Their time smashed the old record of 41.37 by East Germany in 1985.